Comes from NBC's Parks and Recreation. This is a term used to express extreme
disappointment, annoyance, frustration, disbelief, dismay, dumbfoundedness, or irritation at yet another dumb thing that Pawnee, Indiana Parka and Recreation Department employee
Garry "Jerry" Gergich has
done.
This term can be used generically to express the above reaction at any stupid thing that anyone does by replacing the person's real name with "Jerry."
TERRENCE: "
Ugh. I just dropped my peanut butter and jelly
sandwich on your laptop keyboard. Oops."
PHILLIP: "Dammit Jerry! You're such a Jerry!"
TERRENCE: "Who's Jerry?"
PHILLIP: "You are, idiot."