To Be A Turkey

Idiom: to be a turkey

Example:
John: I can’t find my laptop.  I hope I didn’t lose it or get it stolen.
Eli: Oh yeah! I forgot to tell you, Kazu borrowed your laptop this morning.  He said he would have it back to you before class.  His broke and he had to find a way to take notes in class. 
John: He’s such a turkey! He can’t just take things without asking. I have early class today. He clearly didn’t think about that.
Eli: That’s a bit harsh. I don’t think Kazu was trying to upset you. 
John: Who’s the turkeythat suggested he do that?
Eli:  I guess that would be me.  Sorry dude.

Meaning: To be a turkey is an expression used when someone is trying to call someone thoughtless or even a fool.  It’s not a nice thing to say, but it’s used commonly to avoid using stronger or more profane language.