Top Definition
Little baby stomach syndrome. The condition that occurs when you can't handle your food or your alcohol.
Ex 1: My boy used to be able to KNOCK plates at the buffet, but lately he's been eating like a little bee-yetch!
Ex 2: "Haha look at Timmy! He just shotgunned a four loko and got a baddd case of LBSS. He looks like he's straight time travelin."
by joemammy April 29, 2015
Similar to lbs (laughing but serious); lbss takes it a level up Laughing But So Serious
She fell and broke her leg lbss

by Moustache Rider April 29, 2010
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