roflsmodlab Share definition Flag Rolling on the floor, Sucking my own dick, Like a boss. Rofl - Smod - Lab... roflsmodlab Guy 1, "So three guys walk into a bar, right? You'dve thought the 3rd guy saw it coming."Guy 2, "ROFLSMODLAB" roflsmodlab by Mr. Bossman April 22, 2010 Get the roflsmodlab mug.