Two letters!

1) The "K" in jerk off makes it sound harsher than "Jag off" but I've asked a few people who all believe that it's worse to be called a Jag off.

Actually, I think it's an anatomical distinction...... jag off is an a-hole, while jerkoff refers to the other side (aka pri*k). I don't think I've ever heard a female referred to as a jerkoff, if that helps at all.

3) Ah, I didn't know that. Makes sense though. Thanks Professor.

The Urban Dictionary says Jagoff is a Pittsburgh thing.

http://www.urbandictionary.com/define.php?term=Jagoff

[5] Didn't Jagoff play for the Penguins?

[3] The anatomical distinction aside, I don't see a real difference with one or the other when referring to someone. Case in point, is Richie Incognito a jagoff or jerkoff? You can easily make the case for both, as well as add a few more choice adjectives when referring to Incognito.

7) Asshole comes to mind. So does shithead and douche bag.

[9] yeah, agreed.

I think a jagoff is a putz, or a yutz, and a jerkoff is a prick.
but these are cursewords and I don't fucking use them. lowest form of humor, along with the sarcasm.

I don't ever think I heard jagoff until I lived in Pittsburgh. I haven't heard it much since, thankfully. I find it obnoxious. It was used on a new tv show the other night and I figured it was based in the 'burgh. It turns out they are in Philly. So here's my 2 cents, anyway. A jagoff is an asshole and a jerkoff is a fuck up. Pretty much what SB says in [10]

[3] Never knew the anatomical distinction. Interesting!

[0] Great picture by the way, I'll use it with the Jazz Kids when we sing the old Sesame St classic 'One of these things is not like the other..'

Might be late to the party, but always thought that jag off was a more polite way to say jerk off. Both were equal idiots. Kinda like saying friggen for fucken with asshole.

13) That's what I thought too.