The patch of hair that is above the ass crack, can be seen on a man or women, but most commonly seen on middle age to elderly caucasian men. Is referred to as a "Shrimp Nest" because generally adolescent shrimp need a safe place to mature and stay in shallower water with more cover like sticks and seaweed hence the safety of a person's back hair patch for prepubescent shrimp to call their nest.

Sometimes referred to as a "Skrimp Nest" when referring to Afro American people.
My girlfriend loves running her fingers through my shrimp nest.
by Jeffrey James Longdonger January 12, 2011
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