So what if I'm a ham and cheese on rye?
I got to do my thing and that's no lie

from Beastie Boys (Ft. Mix Master Mike) – Unite Lyrics on Rap Genius

Meaning

Ham is not kosher, nor is the combination of meat and cheese. The Beastie Boys, being white and Jewish rappers, clearly have a habit of breaking conventions without apologizing.

‘Ham & Cheese on Rye’ is a great way to describe the Beastie Boys- they are ‘hams’ in the sense of being excessively theatrical in their delivery, they carry a ‘cheesy’ swagger, and ‘rye’ bread is a nod to their Jewish-American heritage.

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