Definitely LMFAO

probably the Jokerr because of his facebook rants but music wise its probably rick ross cuz his **** bores the hell out of me
#DeeMemory for Life!

I cant stand Lil Wayne, or LMAFO, or pretty much most mainstream rap haha

Lil Wayne. I like his music tastes, but his music is just...horrible.
Wiz Khalifa (if that's how you spell it). No talent whatsoever; extremely annoying voice.

man

Take your pick out of Lil' Wayne, Jay-Z, Drake, Kanye West and Nicki Minaj. Utter trash.

Lil' Wayne/Snoop Doggy Snooping Lion Dog

LMFAO. Yeah, nuff said.

Ca$h Out, no doubt

Thanks to you, "Cashin' Out" is now stuck in my head. Thank you. Thank you very much.

I personally don't think bad rappers are that annoying. I just find artists like Wacka Flocka's music amusingly terrible.
I tend to be more annoyed by artists like Hopsin. He's talented, but I get so tired of his moral preaching and him being a "man of god". That's just my opinion, though.