Rosanne bar Share definition Flag When you roll a blunt so good, and so fat, there's only one thing you could call it. A ROSANNE BAR! Dude 1: I rolled this blunt dude, it's a Rosanne Bar. Dude 2: Damn, I love you Rosey (Dan Voice) Rosanne bar by JustSemaj March 6, 2012 0 0 Get merch Get the Rosanne bar mug. Buy Now — $32.95 See more merch