I gotta go cause I got me a drop-top
And if I hit the switch, I can make the ass drop

from Ice Cube – It Was a Good Day Lyrics on Rap Genius

Meaning

Ice cube has to go for a drive because his car is so dope. It’s a convertible (drop-top) lowrider; when Ice Cube turns engages the car’s hydraulics, he can lower the rear (ass) closer to the ground

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