diff --git a/docs/src/manpage.md b/docs/src/manpage.md
index eb35c6611..4e7d229ef 100644
--- a/docs/src/manpage.md
+++ b/docs/src/manpage.md
@@ -1837,6 +1837,7 @@ VERBS
          shift      Alias for shift-lag
          shift-lag  Include value(s) in field(s) from the previous record, if any
          shift-lead Include value(s) in field(s) from the next record, if any
+         slwin      Sliding-window averages over m records back and n forward. E.g. slwin-7-2 for 7 back and 2 forward.
 
        -f {a,b,c}   Value-field names on which to compute statistics
        -g {d,e,f}   Optional group-by-field names
@@ -1859,6 +1860,7 @@ VERBS
          mlr step -a ewma -d 0.1,0.9 -f x,y
          mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y
          mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y -g group_name
+         mlr step -a slwin-9-0,slwin-0-9 -f x
 
        Please see https://miller.readthedocs.io/en/latest/reference-verbs.html#filter or
        https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
diff --git a/docs/src/manpage.txt b/docs/src/manpage.txt
index 62d3f38a6..4a4809c7d 100644
--- a/docs/src/manpage.txt
+++ b/docs/src/manpage.txt
@@ -1816,6 +1816,7 @@ VERBS
          shift      Alias for shift-lag
          shift-lag  Include value(s) in field(s) from the previous record, if any
          shift-lead Include value(s) in field(s) from the next record, if any
+         slwin      Sliding-window averages over m records back and n forward. E.g. slwin-7-2 for 7 back and 2 forward.
 
        -f {a,b,c}   Value-field names on which to compute statistics
        -g {d,e,f}   Optional group-by-field names
@@ -1838,6 +1839,7 @@ VERBS
          mlr step -a ewma -d 0.1,0.9 -f x,y
          mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y
          mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y -g group_name
+         mlr step -a slwin-9-0,slwin-0-9 -f x
 
        Please see https://miller.readthedocs.io/en/latest/reference-verbs.html#filter or
        https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
diff --git a/docs/src/reference-verbs.md b/docs/src/reference-verbs.md
index 4d738c70a..1744fba97 100644
--- a/docs/src/reference-verbs.md
+++ b/docs/src/reference-verbs.md
@@ -3292,6 +3292,7 @@ Options:
   shift      Alias for shift-lag
   shift-lag  Include value(s) in field(s) from the previous record, if any
   shift-lead Include value(s) in field(s) from the next record, if any
+  slwin      Sliding-window averages over m records back and n forward. E.g. slwin-7-2 for 7 back and 2 forward.
 
 -f {a,b,c}   Value-field names on which to compute statistics
 -g {d,e,f}   Optional group-by-field names
@@ -3314,6 +3315,7 @@ Examples:
   mlr step -a ewma -d 0.1,0.9 -f x,y
   mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y
   mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y -g group_name
+  mlr step -a slwin-9-0,slwin-0-9 -f x
 
 Please see https://miller.readthedocs.io/en/latest/reference-verbs.html#filter or
 https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
diff --git a/man/manpage.txt b/man/manpage.txt
index 62d3f38a6..4a4809c7d 100644
--- a/man/manpage.txt
+++ b/man/manpage.txt
@@ -1816,6 +1816,7 @@ VERBS
          shift      Alias for shift-lag
          shift-lag  Include value(s) in field(s) from the previous record, if any
          shift-lead Include value(s) in field(s) from the next record, if any
+         slwin      Sliding-window averages over m records back and n forward. E.g. slwin-7-2 for 7 back and 2 forward.
 
        -f {a,b,c}   Value-field names on which to compute statistics
        -g {d,e,f}   Optional group-by-field names
@@ -1838,6 +1839,7 @@ VERBS
          mlr step -a ewma -d 0.1,0.9 -f x,y
          mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y
          mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y -g group_name
+         mlr step -a slwin-9-0,slwin-0-9 -f x
 
        Please see https://miller.readthedocs.io/en/latest/reference-verbs.html#filter or
        https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
diff --git a/man/mlr.1 b/man/mlr.1
index e40a79860..75db85828 100644
--- a/man/mlr.1
+++ b/man/mlr.1
@@ -2285,6 +2285,7 @@ Options:
   shift      Alias for shift-lag
   shift-lag  Include value(s) in field(s) from the previous record, if any
   shift-lead Include value(s) in field(s) from the next record, if any
+  slwin      Sliding-window averages over m records back and n forward. E.g. slwin-7-2 for 7 back and 2 forward.
 
 -f {a,b,c}   Value-field names on which to compute statistics
 -g {d,e,f}   Optional group-by-field names
@@ -2307,6 +2308,7 @@ Examples:
   mlr step -a ewma -d 0.1,0.9 -f x,y
   mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y
   mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y -g group_name
+  mlr step -a slwin-9-0,slwin-0-9 -f x
 
 Please see https://miller.readthedocs.io/en/latest/reference-verbs.html#filter or
 https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
diff --git a/test/cases/cli-help/0001/expout b/test/cases/cli-help/0001/expout
index 0cf5dbc8b..ba28c57c0 100644
--- a/test/cases/cli-help/0001/expout
+++ b/test/cases/cli-help/0001/expout
@@ -1033,6 +1033,7 @@ Options:
   shift      Alias for shift-lag
   shift-lag  Include value(s) in field(s) from the previous record, if any
   shift-lead Include value(s) in field(s) from the next record, if any
+  slwin      Sliding-window averages over m records back and n forward. E.g. slwin-7-2 for 7 back and 2 forward.
 
 -f {a,b,c}   Value-field names on which to compute statistics
 -g {d,e,f}   Optional group-by-field names
@@ -1055,6 +1056,7 @@ Examples:
   mlr step -a ewma -d 0.1,0.9 -f x,y
   mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y
   mlr step -a ewma -d 0.1,0.9 -o smooth,rough -f x,y -g group_name
+  mlr step -a slwin-9-0,slwin-0-9 -f x
 
 Please see https://miller.readthedocs.io/en/latest/reference-verbs.html#filter or
 https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average