1. With speed
   "We need to finish this project chop-chop";
   - quickly, rapidly, speedily, apace, in short order

1. Exclamation to tell someone to be quicker
   "chop-chop! We're going to be late for the movie";
   - buck up [informal], hurry up, come on, c'mon [informal], get a move on [informal]

Antonym: easy

Encyclopedia: Chop-chop