weird bus dude: hey wanna be my friend????? (waves spastically) b: can't say i do s: well that guy is a few slices short of a loaf of bread
somebody who's not quite mentally competent similarly you may use the phrase, a few fries short of a happy meal
"weird bus dude: hey wanna be my friend????? (waves spastically) b: can't say i do s: well that guy is a few slices short of a loaf of bread" What is the definition of "a few slices short of a loaf of bread"?