(vulgar, slang, derogatory, Australia, New Zealand, UK) Term of abuse.

Alternative spelling of fuck-knuckle

(vulgar, slang) To actively sexually penetrate someone's mouth; to have vigorous oral sex. / (vulgar, slang) To sexually penetrate someone's eye socket.

an instance of skull-fucking

(of a model or replica) Of the same size, scale, or proportions as an original object. / Thorough; complete; not lacking in any detail.

One who is employed, or otherwise engaged in an activity, on a full-time basis.

The complete name of a person, including first name, any middle names, and surname. / Used other than figuratively or idiomatically: see full, name.

plural of fossil fuel

Alternative spelling of skull-fuck

(computing, graphical user interface) Of a window occupying all the available display surface of a screen.