Not sure if it's adressed to me, but
It's been known Clipse (mainly Pusha) & Wayne had beef, way before this year. The track 'Mr Me Too' is directed at Wayne for example.
It was from Clipse feeling Wayne was jacking theior whole swag / style with the BAPEs and stuff. Wayne was feeling disrespected and went on to shyt on them on Complex talking bout he made BAPEs hot and stuff. They been going back on forth in interviews and shyt.
The line was referring to how Wayne was calling himself the best rapper alive since Jay retired (started 04ish). Pusha was saying how you the best when it's known people ghostwrote your raps (i.e. Gillie).
I'm forgetting stuff but that's the gist.