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when you catch an unsuspecting person sleeping and you proceed to whip out your cock and place it on their upper lip and then catch it on film
Becky was real upset when I gave her a cockstache
by Anonymous September 10, 2003
James and Taskin, the inventors of the Cockstache, are also proud wearers of one. Defintion not needed.
"Yo I got a big dick"
by Teekizzy December 17, 2011