Nah, everything you do, you fall back
Girl you lack, cuz you be bringing the wack stuff

from Slum Village – 2U4U Lyrics on Rap Genius

Meaning

She is too relaxed about everything she does.

It seems clear throughout the track her flirtatious attitude with other men exasperates him. That’s probably what he means by “bringing the wack stuff” in this context. The usual baggage that can come with a relationship.

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