bladdergut

Someone who drinks a lot. Not only alcohol, but water /soft drinks too.
A Bladdergut has a huge need for liquids.
Bladdergut children are always at the drinking fountains or thirstily draining bottles of lemonade on camping holidays without sharing or saving drink for their siblings.

James is such a bladdergut....he guzzled all the lemonade and saved none for us, selfish git.
Watch Nick...he is a bit of a bladdergut, he will want to use your loo and will pee on the seat.
Catherine is a thirsty kid...a bladdergut, has to have a drink with meals or can't eat.