Rigor mortis and post mortem
He's dying of boredom
Take your best rhymes, record 'em
Then try to thwart him
He'll just take your punch lines and snort em

from Eminem – Almost Famous Lyrics on Rap Genius

He’s soooooo bored (listening to other rhymes and the fact no one ever disses him) it feels like he’s dead! Anyone have any yayo? (“punchlines” is a cocaine pun).

Furthermore Em became “famous” for his defence raps, see 8 mile. The cocaine pun refers to the haters “hate” fuelling his best work.

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