Ok, I'll try to forget it then, although imagine it'll keep me awake a bit tonight
back teeth are floating
When somebody has to pee so bad that the urine has filled their whole body all the way up to the back of the mouth and makes the back teeth float in urine
I had to piss so bad that my back teeth are floating
Urban Dictionary: teeth are floating
When one has to pee really bad. The expression: "my teeth are floating" is used. To describe that one is so full of urine it has filled up their body to the back of their throught making there teeth float in the urine.
www.urbandictionary.com