As if I'm jean sinning
My tongue make em hip hop run I'm Gene Simmons
Get it?

from The Jealous Guys – Brainwashed By London Lyrics on Rap Genius

Meaning

Since the selvedge is meant to prevent jeans from unraveling (or bleeding) he’s sinning because it’s against the nature of the denim to do so.
Yet another jean here, is Gene Simmons who is known for his abnormally long tongue.

Casa’s tongue (his raps) is the hip hop equivalent.

And if that isn’t enough for you, Casa can “make em RUN” like Run DMC, who just so happens to include another Simmons — Russell Simmons.

Woah.

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