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1.
<noun> 'sh-um-lee-um-lum-doob-illy' singular: Derived from slang

A large penis
Person A: "My man, you got the utensils to pierce my shum liam lum doobily?"
Person B: "You sure you want to do that to yourself"
Person A: " Yeah dawg, I want a big ol' metal rod drilled right through my one eyed monster, but no homo shit when your down there homes"
Person B: "Iiiite then, 50 bucks and whip it out"
Person C, B, D, E and F collectively: "Oooooooh SHIT"
by Kevin Briggs September 21, 2011