cop off

American slang for stealing or pocketing an item, often of dubious or minor value. Archaic , dates from the 1950s-1960s, especially popular on the West Coast in those days.

May have been replaced by "rip off" in the late 1960s, which became a much more broad term and eventually a noun as well as a verb.
"I'm not putting my beer down. One of these biker dudes might cop off with it."

"Where's my hat?"
"That chick you were talking to earlier. I think she copped off with it."
by malbuff March 12, 2020
mugGet the cop off mug.