Target: Dilated Peoples, Everlast, Limp Bizkit
Producer: Eminem
Album: Devil's Night
Label: Shady/Interscope
First Strike
Best Line: "You fuckin' sissy, up on stage, screamin how people hate you/They don't hate you/ They just think you're corny since Christina played you."
In the early 2000's, when Eminem was still a TRL darling, he was engaged in a war of words with rapper ternt (blues) sanga Everlast. The pair traded a few solid diss songs, when Eminem invited the then-relevant rap/rock hybrid Limp Bizkit to join in on the fun. One problem: Limp Bizkit's DJ, Lethal, was once in the rap group House of Pain with Everlast.
Limp Bizkit quickly reneged on the collaboration, but not before DJ Lethal went on MTV and proclaimed that Everlast would beat up Eminem if they came to blows in real life. This did not sit well with Marshall, who closed out D12's Devil's Night album with "Girls," an attack on not only Limp Bizkit, but Dilated Peoples and Everlast as well.
#18. Eminem f/ D12 "Quitter / Hit'Em Up Freestyle" (2001)
Target: Dilated Peoples, Limp Bizkit, Everlast
Producer: Eminem
Album: N/A
Label: N/A
Career Ender 
Brought the Homies 
Women & ChildrenBest Line: "Figured you could diss me to jumpstart your career/I'll punch you in your fucking chest until your heart kicks in gear." (Eminem)
The feud between Eminem and Everlast began after Em supposedly snubbed Everlast backstage at a concert in 1999. The two traded a few disses back and forth, but it wasn't until Everlast brought Em's daughter, Hailie Jade Mathers, into the mix on "Whitey Ford's Revenge" when the beef got serious.
Mocking Everlast's flop of an album that was Eat At Whitey's, Em went on to clown Everlast's career as a singer, and leaned heavily on his poor heart condition. On the second half of the track, Eminem remade 2Pac's "Hit Em Up," using Pac's rhyme pattern and cadence to continue the attack on Everlast, before letting D12 get in on the action.
#11. Eminem "The Sauce / Nail In The Coffin" (2002)
Target: Dave Mays, The Source, Benzino
Producer: Eminem
Album: N/A
Label: N/A
Women & ChildrenBest Line: "What you know about being bullied over half your life/Oh that's right/You should know what that's like/You're half white."
No stranger to beef with Hip-Hop magazines, the feud between Eminem and former Source Magazine co-owner, Raymond "Benzino" Scott, began when Benzino publicly attacked Eminem's whiteness, claiming he had an unfair advantage over rappers of color and was bad for the culture. After threats of an Eminem boycott from The Source, and a slew of diss songs from Benzino, Em unleashed the ether-filled "The Sauce" and "Nail In the Coffin" on a Shady mixtape.
Equally venomous, both tracks picked apart Benzino's failed rap career, age, and the exploiting of Zino's son for his own financial gain. The Source Magazine and Benzino would never be the same, despite spending many years and dollars attempting to kill Marshall's career.
http://www.complex.com/music/2011/06/the-50-best-hip-hop-diss-songs/
Gets me every time
