Green’s Dictionary of Slang

oneself; thus go for delf, release your delf.

1991		Tribe Called Quest ‘Check the Rhime’ 🎵 Delf for self, see, there’s no one else.
1997–2000		Da Bomb 🌐 23: Release yo’ delf: Similar to coming out of your shell; get crazy; show your potential; ‘Delf’ is a slang combination for ‘dead self.’.
2002		‘Touré’ Portable Promised Land (ms.) 158: We Words (My Favorite Things) [...] For yo ass. Go for delf.