A McShlong is an extremely large penis, and certain indiviuals that wear tracksuits with goggles on them say this alot, because they think their penis is huge, but is in fact tiny.
Scally 1: Arrr mate, i cant cross my legs 'cause my McShlong gets in the way
Scally 2: I know how you feel mate.
Scally 2: I know how you feel mate.
by mikey tee! August 18, 2008
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