BSEG Share definition Flag Big Stuff-Eating Grin (polite) Big Shit-Eating Grin (common usage) When Bill IM'd his buddy about his weekend antics, he signed off with *BSEG* and went to find more trouble to write about. BSEG by shrtstrwbrryblnde January 2, 2008 0 0 Get merch Get the BSEG mug. Buy Now — $32.95 See more merch
