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unsatisfying coitus with an extremely small penis... so small, in fact, it is sucked up into the man's body like the head of a turtle, nearly making intercourse completely impossible altogether.
Brian: "It's just sad when you please a women and they go crazy. She was begging for another donkey punch."

Kelly: "...more like a turtle thump"
by havwingswillfy April 08, 2010
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Jul 2 Word of the Day
Someone people turn to when they're sad who makes them feel better.
Dude, I was so unhappy about my girl, until I spoke to my serotonin donor who really helped me feel better
by jonfurstn1 November 27, 2009
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