A delray or del-ray is a dumb dolt bastard, a dunce, idiot, moron, dilbert and/or a pile of stupid.
Jon "Matt, did you just see that dude?"
Matt "Yeah, he's a fucking delray."
Jon "What is that?"
Matt "It's a fucking mouse! You del-ray."
Matt "Look it's Petey Pete!"
Jon "She's a fucking del-ray and a half."
Matt "Yeah, she is."