Top Definition
When the Female is taking a Pooh and a male gets there thumb and thrusts it up and down in the females V.
Ewric! Hurry and give me a Thumbpkin I've got the Runs!! Ok Nancy, Only if you let me use both :)
#blumpkin #thumb #toilet #poop #pooh #male #female
by Rekanize 801 January 14, 2010
7 Words related to Thumbpkin
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