You would think that I had a match for a tooth

from Wale (Ft. Kingpin Slim & Torae) – Sharp Lyrics on Rap Genius

Meaning

The head of a match the often contains phosphorus that ignites from the heat of friction if rubbed/struck against a suitable surface.

In this line, the resulting friction from Wale’s teeth (while rapping) would be similar to the igniting friction of a match head.

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