Yeah it's prime time, my top back, this pimp game ho
I'm red leather, this cocaine, I'm Rick James ho

from Kanye West (Ft. 2 Chainz, Big Sean & Pusha T) – Mercy Lyrics on Rap Genius

Meaning

Prime time is from either 7:00 PM — 10:00 PM or 8:00 — 11:00 PM, depending on your timezone. This means it’s probably dark outside, so Pusha has his convertible top down to view the stars.

Pusha T is no stranger to wearing his hats backwards, or in the context of this line, his top back.

His pimp game and his coke money pay him so well that he can afford red leather. It’s very common to see a pimp or a drug dealer wearing flashy clothes such as red leather suits.

Pusha T is a noted cocaine dealer, Rick James was a noted cocaine user, so they share that connection.

“I’m Rick James, ho” refers to the Charlie Murphy story where Rick goes around telling various women to do something for him since “I’m Rick James, bitch”. Rick James famously wore red leather boots.

http://www.youtube.com/watch?feature=player_detailpage&v=Wp3x6l5dZp8#t=30s

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