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1.
Placing shit on the tip of your dick, either by anal sex or dipping it directly in shit.
Gloria shit on the ground so I could chalk the cue before I put some Dirty English on he.
by OEric January 08, 2009
 
2.
When your significant other takes out their glass eye and you gently insert the head of your cock into the socket in an effort to attempt a traditional "skull fuck" of some sort.
When Ron Jeremy met Sandy Duncan, he thought he might need a minute to chalk the cue.
by The Nature Boy August 10, 2008