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Shoving your thumb up a woman's ass when in the doggie position, and you tickle it around.
Threewheelin'= You have a woman in the doggie position, put thumb in mouth, pop it out (makes pop sound) and insert in woman's ass and tickle.,
by donkeypunchinventor July 10, 2008

Words related to Threewheelin'

anal comfort doggie style sex tickling