Shylock was a character in one of Shakespear's plays (The Merchant of Venice). He was a Jewish usurer, so saying that a person is a Shylock means he's a loan shark.
You really shouldn't mess with the guys down on 57th, they're real shylocks and the interest rates will kill you.
The curly ear locks that male Hasidic Jews have... pejorative of course... and not to be confused with the oddly similar and equally stylish chelsea hair-do.
It officially means loan shark, but in reality, it should mean, victim, victim that reacts and gets punished because "Jews aren't supposed to fight back"! Like Shylock himself!
Example 1 Shylock (rightfully angry)-and what's his reason, I am a Jew!
Everyone Else in the play-You deserve it, you're a Jew!
(In the end he is forced to convert to Christianity!)