1. To leave or depart very suddenly, abruptly, or hurriedly, especially without permission. Primarily heard in Australia. She and two other kids had nicked off from school. The man I had asked to cover for me apparently nicked off early, which meant that I got in trouble for leaving the post unattended.
2. To steal or filch something from someone. In this usage, a noun or pronoun can be used between "nick" and "off." Primarily heard in UK. I nicked a cigarette off my roommate and headed outside. Check out this wallet I nicked off a tourist in the city centre.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.