When you all know; them fuck niggas start hatin'

from Wiz Khalifa (Ft. Juicy J) – The Plan Lyrics on Rap Genius

Meaning

If you made something there is always a bunch of people full of envy who wants to take you down. They hating cause they want to have all that stuff that you’ve got

This also makes a homophone with
“When you on though, them fuck niggas start hatin'…"
as if to paint the reverse side of the good life.

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