a derogatory cry,not unsimilar to 'wank off' or 'fuck off'
your only going to give me €20 your this signed Barry Manilow LP? Jew off!
A competition to see who can be the cheapest or get the best deal on something.
I got this new TV at Walmart for 400 bucks!" "I bet I can get it cheaper on Amazon....how about a good 'ol jew off?