Boy Water

When jizz is mixed with questionable water contents at a frat party

I went to a frat party with a water slide and got splashed by the boy water accumulating in the splash pool

Water boy

Someone who is Useless, and dumb

Zach is a water boy

Water Boy

A boy who is VERY VERY naughty and wastes water willingly. He fills up his cup and throws water around.

David: HEY WHY DID YOU POUR WATER ON ME WHAT THE HELL OMG OMG!!!

Water Boy: YES AND I WILL DO IT AGAIN TO YOUR PENIS