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A Steam plane is when a group of LAD's get so drunk (steamed) that they board the 'Steam Plane'.

The most steamed person flies the steam planes and gets to choose the to the next pub
LAD1: "Mate are going to steam tonight?"
LAD2: "Yes, I going to get so drunk I think I'm going to board the steam plane!"
LAD1: "You talk a big game boss"

Im so drunk I think I'm aboard the Steam Plane!

"All aboard the steam plane"
by phillipo1 March 30, 2013
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