This guy at White Castle asked for my autograph
So I signed it:
"Dear Dave, thanks for the support, asshole"

from Eminem – My Name Is Lyrics on Rap Genius

Meaning

Em’s complicated, sometimes antagonistic relationship with his fans is explored in more detail in Stan

After working together on this song, Dre actually gave Em an autographed glossy with “Thanks for the support, asshole!” written on it

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