go number one(redirected from go number 1)
go number one
euphemism To urinate. ("Go number one" is a euphemism for defecation.) I only have to go number one, so I won't be gone long. A: "Mommy, I have to go to the bathroom." B: "OK, sweetie. Do you have to go number one or number two?"
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.