Top Definition
The act of being one hundred percent honest and true to thyself. Another word for the saying "Keeping it real".

To never change or try and be like everyone else.
The opposite of fake.
:I really think Paul is fake.
:No way he has always been like that Paul is always Sirloinin'.

:I keep it Sirloinin' everyday
by GymRatCouchMan May 02, 2011
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