1. slang Very early in the morning. Primarily heard in UK, Australia, New Zealand. Please tell me that's a fresh pot of coffee because I've been on call since sparrow-fart.
2. slang Someone or something regarded as unimportant or insignificant. That sparrow-fart can say whatever she wants—that doesn't mean I'm going to listen to her.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.