RHH
RHH, when pertaining to boards, mean Rap/Hip-Hop. But beware, some RHH boards are absolutely ridiculous. Such is the case with the RHH board of GameFaqs, where J. Cole is considered to be better than Eminem, and Lupe Fiasco is considered to be better than Big L. Also, the board consists of 85% white dudes, but for some reason they swear they're black.
Example of an average Gfaqs RHH topic:

"Yo ninjas, yall heard dat new cole track?! G.O.A.T!!!!"