bust a nut
1. rude slang To exert a significant amount of energy or work very hard to do, accomplish, or complete something. I've been busting a nut to get this presentation ready for tomorrow's meeting. He's going to have to bust a nut if he wants a place on the varsity team. I've been busting a nut studying for this exam, so I really hope I get a good grade.
2. vulgar slang To ejaculate.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.