fart lasso Share definition Flag A fart so bad that its like someone wrapped a lasso around your neck and pulled it tight. You can't breathe. Dude, yesterday I gave Chris the ol' fart lasso. He didn't breathe for so long he turned purple! fart lasso by Flaming Moobs December 3, 2013 0 0 Get merch Get the fart lasso mug. Buy Now — $32.95 See more merch