Verb
use the bathroom (third-person singular simple present uses the bathroom, present participle using the bathroom, simple past and past participle used the bathroom)
(euphemistic) Synonym of use the toilet: to urinate or defecate, especially (but not exclusively) while visiting a bathroom.
We went camping and had to use the bathroom in the woods.
What you forget when you're planning a hijack by yourself is somewhere along the line, you might need to neglect your hostages just long enough so you can use the bathroom. Chuck Palahniuk
I'm not at the point where I'd feel safe in a house alone. I would be really scared. I'm the kind of person that when I get up to go use the bathroom I have this big long hallway, and I just know someone's going to jump out and get me. Britney Spears
Fact: upon locking yourself our of your apartment you will immediately need to use the bathroom. Fact: and then you will stand in place and watch your door. You will just stare. As though rebuffed by it. As though it has done this to you. Augusten Burroughs
My roommate says, I'm going to take a shower and shave, does anyone need to use the bathroom It's like some weird quiz where he reveals the answer first. Mitch Hedberg