The rapper cited Brown's domestic charges against ex-girlfriend Rihanna as the reason for refusing the offer, before removing the tweets shortly after.
In his original tweet, he said: "Got offered good $ to let a film use my music for a trailer. the catch? starring chris brown. woman beater. sigh. no. #notenough$inexistence. (sic)"
He then claimed that his motivation for the decision was thinking of his mother and sister.
After receiving praise for his stance from his followers, he told them "enough with the respect s**t", before adding that despite everything, he had still considered it.
He then deleted the tweets, saying: "I don't think, ultimately, it really needs to exist beyond real life... and I damn sure don't feel right coming off like I'm amped about myself when I should just be dealing how I deal in private."
Watch El-P's video for his track 'The Full Retard' below: