Niggas pretend like they actually in
But when it go down they fuck around and be them

from Fabolous (Ft. Lil Wayne) – That's Not Love Lyrics on Rap Genius

Wayne is referring to the “game” here. Saying that people pretend to be with it, but when shit goes down they’re just “snitches” (back to the previous line) and look out only for themselves.

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