The female recipient of a man doing nothing other than to shoot a load of his jizz into her pussy and "get his rocks off." Essentially, a "fuck bucket" is simply a human sexual object, overwhelmingly female, who is nothing more than a receptacle for a man to "stick it in her" so he can get his rocks off. A very pejorative term applied to a woman.
by Cunt-a-bility December 22, 2012