acronym for leeky butt syndrome. a stomach condition when it takes effort to hold in your diahrrea, and some may leek unbenounced into your boxers.
often reference to the effects a long night of drinking has on one's stomach. AKA peeing out of your butt.
"man, i can't believe how much we drank last night!"
"i know it. dude i'm gonna have LBS all week!"