Drop-tops with no ceilings
And I ain't talking about Tunechi, bitch

from Fabolous (Ft. Meek Mill) – You Don't Know Bout It Lyrics on Rap Genius

A drop-top is slang for a convertable. Comes from the top of your car dropping and folding down in your trunk. Therefore, having no ceiling.

Tunechi is one of the many nicknames of rapper Lil Wayne, who had a mixtape called No Ceilings.

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