cop on
Advanced (C1) informal
To stop being silly and start behaving sensibly.
"Cop on, will you — you can't keep spending money you don't have."
Hear it in context
Police Stings: Last Week Tonight with John Oliver (HBO)
LastWeekTonight · 3:24
see a cop on camera since that Boston
S13 E06: Iran & Police Stings: 3/22/26: Last Week Tonight with John Oliver
LastWeekTonight · 11:07
see a cop on camera since that Boston
Police Stings #lastweektonight
LastWeekTonight · 1:59
see a cop on camera since that Boston