She menstruates weekly, her vibe covers keep you warm
Hip-hop culture disperses weekly, through the magazines mentioned in the next lines. In this line, Nas mentions Vibe Magazine as well as HipHop Weekly
By using the word “menstruates,” Nas is adding to the female personification of “Hip Hop”. She is on her period every week, instead of ¼, therefore she (she being hip hop) is always a bitch.
ALso, being on magazine covers keep rappers “hot” (warm) in the streets. This may also be a play on words since being under a bitch’s bedcovers keeps a nigga warm, in this case, that bitch is hip hop.
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