slang for someone who won't shut up.

to whinge
to be a whinger

ties in with "whiner"

sometimes refered to as a "karade"

Someone who is always complaining

Someone to complains about everything.
A person who bitches about fucking everything.
A pussy.

A sparkling bitter beverage drunk in large quantities by discontented individuals. Also see Hater-ade

Someone that complains by stealth in order to undermine their victims.
A person that uses something you've told them in confidence to get at you behind your back.
Someone that deliberately puts shit on you for personal gain.

A person who whinges a lot, generally used jokingly.

(Win-jer fag-got) Also abbreviated as W.F.

One who cannot stop complaining whilst annoying the entirety of the room by creating a massive drama over nothing. Childlike behaviour.