TagaShagging
The act of having sexual intercourse or oral sex with a female, then writing your name upon them with your semen or "tagging" them your name is usually written in Graffiti style as it has to be quick.
Last night Roxxi was giving me the most brilliant blow job, I rewarded her by writing my name on her tits with my semen, she got totally tagashagged, that's tagashagging.