Top Definition
A person or persons selected to accompany a driver on an automobile trip for the sole purpose of having access to the carpool (HOV) lane.
Scott needs to be in LA for a 10:00 am meeting. The trip from San Diego could take 2 hours or 3 hours each way depending on traffic. If he can find a Carpool Monkey, he can use the HOV lane and cut his travel time in half.
by xemo November 12, 2010

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