1 definition by roro ownz urmom

Top Definition

an alternative way of saying OMG except its COOLER AND DIFFERENTER. generally an exclamation of surprise or anger. shortened as OSB

Guy: "YOU FUCKED MY MOM?! OH SHIT BOB!!!"

or

Girl1: "He just asked me out! Ahhhh OSB!!"

Girl2: "OSB!!"

by roro ownz urmom March 23, 2009