butt iq Share definition Flag Stupidity is relative to the IQ of someone's head. Henceforth, if someone is stupid in their head, they obviosly are either as stupid or stupider in their butt. "Strong Bad got an 'A' in Butt Algebra" butt iq by M_Kitsune June 21, 2003 0 0 Get merch Get the butt iq mug. Buy Now — $32.95 See more merch