genius rap 

A type of rap music characterized by intelligence and lyrical fortitude as opposed to faint-hearted tempos and monotonous content. The opposite of anything you'll ever hear on the radio.

That Slaughterhouse mixtape was riddled with genius rap, it sounds like they actually think about their lyrics before performing them.

genius rap by TJ Warbucks May 22, 2014

Rap Genius'd 

to search song lyrics on the website rapgenius.com to understand their deeper meaning.

I rap genius'd the lyrics to that common song and now I understand the extended metaphor.

Rap Genius'd by ixobile September 25, 2012

Rap Genius 

This website that will 'translate' your song lyrics for you.

which i think is great, its actually a really great idea

but i have already needed help in that category for years

and i think almost a decade ago someone else thought up that idea or had a website that already does that

it is called urbandictionary.com

its pretty good too

(article in businessweek
rap-genius-decodes-lyrics-for-the-masses)

Actually,now that i think about it...whatever furthers education

"Rap Genius Decodes Lyrics for the Masses
Three Ivy League grads launch an online startup to decipher rap lyrics"

urbandiction

Rap Genius by gRyPhOn December 4, 2011

rap genius 

Some art-school douche who thinks he/she's a literary genius and can interpret the lyrics to any song, but really he/she knows jack shit. Named after the infamous website rapgenius.com where such creatures are known to congregate.

Some rap genius believes that "The Sound of Silence" is about JFK.

rap genius by ChetManley June 7, 2013