Green’s Dictionary of Slang

fade v.3

[SE fader, a slider on the mixing board; if one pulls the fader down it gradually reduces the volume; note also fade v.1 (2)]
(US black)

1. to ignore, to erase, to get rid of.

[US] Dr Dre ‘Bitches Ain’t Shit’ 🎵 But I and her know that they can’t fade this.

2. to shoot dead.

[US]L. Stavsky et al. A2Z.