(sense 2): Interjection signifying annoyance. Very similar to sense 1, but more annoyed than resigned. (Probably from Cockney accent of English "Hey".)
(sense 3) Greeting meaning "hello" or "Hi". (Probably from Cockney "hi").
(sense 2) Oy! What the 'ell do ya think you're doin'?
(sense 3) Oy, mate! 'ow's it goin'?
basically, the word "oy" is putting *smacks forehead* into a word.
Sam: we have practice?
Phil: they dont get it still?
I would assume that most British people would also find the expression, "yo!", very strange.
"Oy! I mean, Yo!" - dyslexic American
commonly used by jews :)
ALSO short for oysh, which is short for oh shit
Commonly used by wannabe jews and parents who censor
person 2 : oy!