Sweeping up my competition, call me Mr. Broom
Knocking niggas over, call me bulldozer

from Chris Brown (Ft. Tyga) – Holla At Me Lyrics on Rap Genius

Meaning

He talks about “sweeping up competition”. If you sweep up competition, you’re defeating your opponents: Mr. Broom.

Bulldozers knock things over (and sometimes people..)

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