Derived from the term describing the routine of submarine sailors where they share a bed or "rack" among three people. Each sailor sleeps in 8 hour shifts, thus the "rack" is still warm from one sailor's body heat when the next sailor enters it to sleep.
Term used to describe a male whose is evincing effeminant characteristics.
Ex...That short red headed "Crab Racker" hoe, The One that walks up and down pierce street, all day, looking for money, so she can drop off more crab racking mother fuckers just called me again for the tenth time this week.