IDB Share definition Flag IDB = In Da' Butt Internet slang for anal sex started by the members at the Tweak3D Forums. Would you do her IDB? Hell yeah! Do you like it IDB? No. I'm not gay like you. IDB by Ivanolo July 27, 2004 0 0 Get merch Get the IDB mug. Buy Now — $32.95 See more merch