1 definition by mr.handsthedestroyerofeyes
belly boner is nsfw gif or vid of a man having sexual relations with substantially large dildo that he wedged between his mattress and box spring.As he proceeds to insert the dildo and go at it you notice that this dildo is in fact so large that it pokes through his stomach and shows a slight indentation in his belly hence the name belly boner.
surely you jest my good man mo mere mortal could take that size of a penis and not end up like mr.hands dead of a perforated colon.no my good man smple google belly boner and bare witness to this oddity
by mr.handsthedestroyerofeyes June 9, 2012