A backward gnome.
Basically, a little special, or mentally challenged person.
(In the changing rooms of a clothing store. Betty is kindly waiting outside to give her opinion on the outfits cal is trying on.)
Carol-Ann: What top am I trying on first??
Betty: I dunno, the curtains shut, I can't see can I...
Carol-Ann: I'm not asking you to guess...I'm asking which one I should try on first. You emong.