Young Tune nigga,
A combination of two of Weezy’s (many) nicknames: Young Carter + Lil Tune (as he explained, his grandma used to call him “Lil Tune”)
The nickname is notable because Wayne’s Twitter “handle”, @lilTunechi, is a combination of “Lil Tune” and “Gucci” (I’m guessing his grandma likes Gucci..)