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Main Vain
Also known as the penis. There is no muscle in the penis, the penis is erect by a massive rush of blood. Therefore another nickname for the penis is the Main Vain.
Main Vain by Butcher Jadali August 27, 2009
Related Words
Drain the main vain
Drain the main vain by Nttm May 19, 2010
drain the main vain
drain the main vain by gareth matthews February 1, 2007
railing the main vain
did you hear about Leslie!? last weekend she was railing the main vain on a cruise ship and now shes married to a 65 year old millionaire.
railing the main vain by Jerry Himself August 2, 2017
More from Urban Dictionary
wrongun
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
square grouper
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
Bunhead
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
trucker's tan
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
trucker's tan by population361 May 30, 2006
Word of the Day on October 5, 2026
kidulting
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026