Gabby Rouleau Share definition Flag Best damn trombone player in the world and coolest person this side of the Mississippi. Dude you're just like gabby rouleau; the coolest! Gabby Rouleau by samabandgeekxoxo August 12, 2011 0 0 Get merch Get the Gabby Rouleau mug. Buy Now — $32.95 See more merch