I gotta piss like a wounded Jap 

What someone says when they have to pee really bad. During World War II, thousands of badly wounded Japanese soldiers were abandoned in the jungles of the South Pacific. Their wounds prevented them from being able to unbutton and pull down their trousers by themselves. Therefore, they were left to die alone with extremely full bladders.

Situation 1:

Drunk guy #1: Oh man, I gotta piss like a wounded Jap!

Drunk guy #2: Dude, you have the weakest bladder in the world.

Situation 2:

Wounded Japanese Soldier: Ooooooohhhh!!!

I gotta piss like a wounded Jap by DJJazzyJeff9 April 16, 2013