Don't drink too much before bed you'll have to go number three in the middle of the night

Are you going to the toilet to do a number two or number three?

Number one - Pee
Number two - Poop
Number three - Diharreah

I need a number three

That stomach bug have me number three, not fun

I wish toilets accommodated for number three’s as they do for number ones and twos

I need to attend to my number three by changing my tampon

Joe - "What's your jersey say?"
Ben- "Number three."
Joe- "Best number EVER!"