Cop off Definition 1 of 2Pro Tip 1/3Sudden Departure Used to describe leaving quickly, often without notice. After the argument, she copped off before anyone could apologize. Pro Tip 2/3Stealthy Exit Implies leaving a place or situation quietly so as not to attract attention. He copped off from the meeting to avoid further questions. Pro Tip 3/3Informal Usage Considered casual language, not suitable for formal or professional settings. I might cop off early from the pub tonight.