What does 'shagged jewboi' mean?

This guy who I used to talk to called me a 'shagged jewboi'
I'm a girl btw
(Someone asked him for his opinions on me on kiwi)

olderwiser100a2015-07-08T11:57:57Z

not sure, but it doesn't sound good, and certainly should not come out of the mouth of a friend. specially a guy. not at all nice.