Lyrically Insane 

Commonly known as a 'wordsmith', someone who is Lyrically insane uses similes, metaphores and with ease can use these methods as a play on words. See Lyrical Abyss aswell as wordsmith

"Damn son, that cat is lyrically insane!"
This is an excerpt that can be catargorized as lyrically insane.

"You couldn't see me even if you used a telescope at Florida's Cape Canaveral Launch Site."

Lyrically Insane by Lyrical Abyss December 10, 2008

Lyrically Insane 

Someone who splurts out 'wicked' words and don't give a fuck about what they say.

Eminem.
"Fuck you too bitch call the cops, uma kill you and your loud ass mother fucking barking doggs!!"

Lyrically Insane by Nico January 11, 2004