diff --git a/script/dellines b/script/dellines
new file mode 100755
index 0000000..a67e402
--- /dev/null
+++ b/script/dellines
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+#
+# dellines deletes lines in multiple files matching a regex
+# Example: dellines '^//' src/ *.go
+
+set -e
+
+matchpattern="$1"
+path="$2"
+filepattern="$3"
+
+if [ -z "$path" ]; then
+  echo "Usage: dellines <pattern> <path>"
+  exit 1
+fi
+
+if [ -z "$filepattern" ]; then
+  filepattern="*"
+fi
+
+if [ $(uname -s) = "Linux" ]; then
+  echo "TODO: fix for Linux"
+fi
+
+find "$path" -type f -name "$filepattern" -print0 | LC_CTYPE=C LANG=C xargs -0 sed -i '' "/$matchpattern/d"