With guidelines to put your hand on your chin and think
Ears listen before you say a record ain't mink

from O.C. – Ma Dukes Lyrics on Rap Genius

The word “mink” here means hot/warm as in a mink-coat, which keeps you warm in winter. So he’s comparing his songs to a mink-coat.

His rhymes will put you in a position like this:

Thinking, “Damn his rhymes are hot!”

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