blow your back doors off Share definition Flag To give someone (male or female) a seriously good fuck in the ass. So good it blows the doors off. Shabba "I'll blow your back doors off." Fit Girl "Get away from me you freak." blow your back doors off by Alex "FatSage" November 2, 2006 0 0 Get merch Get the blow your back doors off mug. Buy Now — $32.95 See more merch