WaterTrash is a person who smells like trash that has been floating in water for atleast six months or longer. These people have no form of personal hygeine.
You should go take a bath and put on some deo because you smell like watertrash.
Essentially a collection of grossness that accumulates in kiddy pools at country music festivals. This includes but is not limited to: overcooked brats, dirty sandals, used band aids, shitty mud, etc
Did you see Amber splashing around in that Dirty Brown Water Trash last night? Not really surprised at all