Noun. Someone who is extremely arrogant or idiotic - So much so that they deserve to have the head of their penis slammed in a sliding glass door. Often used in reference to one's superiors or to someone who has done them wrong.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.

The slamming of a dick on one's face. They're face will be numb for about 3 minutes, Then you slap it across again for good luck.

Verb. The act of engaging in vigorous, and possibly violent coitus with a preselected partner. The sexual relations are always consentual and are performed by wizards of their craft, strictly picking up the classiest and hottest girls for participation in the 'dickslam'. The term was popularised in early 2009 by a cult, religious sect based in Brighton, England, known loosely as the 'dickslammaz'.

Basically slamming your dick in a girls vagina and not telling her that your going to do so.