1 definition by PaceBusHookup

Top Definition
When a penis is placed under an armpit and the receiver moves there arm up and down like they are ringing a bell for a choo choo train.
This reminds me of my fourth grade camping trip when Mr. Hitchens broke into my tent, forced his cock under my arm, an ordered me to give him, an Armpit choo choo.
by PaceBusHookup March 03, 2011

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