drain the main vein
drain the main vein
vulgar slang Of a male, to urinate. "Main vein" is slang for the penis. Will you order us another round of drinks? I'm just going to go drain the main vein real quick.
See also: drain, main
Farlex Dictionary of Idioms.
- main
- branch off
- by main force
- (one's)/the main squeeze
- be (one's)/the main squeeze
- someone's main squeeze
- be somebody's life
- be (one's) life
- go straight
- go straight, to