If you were to parse the sentence literally, that's what it would mean. (Or perhaps tell it to anyone or tell it to someone.)
However, in reality, it's a kind of double-negative slang.
What it really means, idiomatically, is:
Don't tell (it to) anyone.
It's the same kind of informal expression as:
I didn't do nothing.
This expression, despite its literal meaning, is actually used to express:
I didn't do anything.
In this context, nobody and nothing don't have their normal meaning; instead, they are used as a way to increase the emphasis on the negative.