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1.
When you piss on a girl's chest and then use it as lubrication to tittie fuck her.
Last night I had to go to restroom real bad so I just decided to give her a "Dirty Keith" instead.
by joe dirt jr January 15, 2007
 
2.
sex act in which a dildo is used to penetrate the mouth once it has entered the anus or vagina
She loves her man to perform dirty keiths on her because she is a total cumdump.
by razzmatazz6758 August 21, 2009