jew!
Anti-semitic yes, but we didn't mean it like that. If PE was cancelled, the assembled class of 60-ish boys would spend 2 hours in stuffed into a classroom, "supervised" without fail by an inept teacher. To liven things up, someone would roll a 1p piece to the front of the class. When the teacher noticed it and picked it up, the whole class would stand up and scream "JEW!" at her. I feel ashamed to have been a part of this, but you should have seen her face.
written by St*ve M*Donal*, approved by Log

Taking this definition a step further, "Jew!" was a game played in our grounds. All the younger kids would gather in the tennis court. At this point they'd be locked in by big kids. Now the older kids take turn at throwing pennies into the tennis court. To 'win' you have to rescue the penny from your other friends in the tennis court. This penny is your ride to freedom, without a penny you will stay in the tennis courts forever, or until the bell rings, whichever comes first. Fun game, but a lot of kids got hurt.
written by Al*x Lee, approved by Log

'jew run' - a footballing term describing the glory-seeking pitch-length run of the boy who wanted to score the goal.
Thus, if someone selfishly hogged the ball it was called a 'jew run'.
In my innocence, I always assumed that what was being said was 'due', as in 'due respect'. It was only recently that I discovered the anti-semitic overtones of our playground taunts. Obviously I pissed myself.
written by an*ny*ous*use*, approved by Log

'jewish flick' - another semitic footballing term. This refers to an attempt to control a ball that is behind you by bending your knee and raising your foot to around arse-height. Almost always unsuccessful.

Popular in the playgrounds of North London, hence the name, which is consequently not actually anti-Semitic. Consequently, not actually that funny.
written by an*nym*us *ser, approved by Log

In Yorkshire, 'Jewish' was a synonym for lucky. For example, if one received a chopper for Christmas, you were a Jewish bastard. Similarly 'Jew' could be used as a verb, as in one could 'Jew' a lucky goal. In addition, if one procured goods or services free of charge you could be said to have 'Jewed' them. This was also interchangeable for cheating, especially on your friends; “you just jewed me out of my dinner money!”
Why having the end of your cock chopped off at birth was considered lucky is beyond me.
written by sp*ce*mon*ey, approved by Mansh