Make my haters sit the fuck down, Franky Roosevelt
With that polio flow homie I'm dope as hell

from Chris Webby (Ft. Zavaro) – Until I Die Lyrics on Rap Genius

Meaning

Franklin Roosevelt(FDR) had Polio. This is a paralytic illness which confined him to using a wheelchair much of time. Thus he was sitting down.

Polio is an illness, so Webby is using it to say that he has an ill or sick flow.

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