That's right I'mma kill this shit and
If the glove don't fit I'mma need a catcher's mitt
Cause I'm high like a pitch yeah I'm high
Like a pitch like Mariah and shit

from Lil Wayne – Demoliton 1 Lyrics on Rap Genius

Meaning

Cather’s mitts are bigger than general gloves. Hes high from marijuana like a pitch as in baseball. Also a pitch as in singing. Mariah Carey is known to hit high pitched notes.

Also a reference to the OJ Simpson “If the glove doesn’t fit” murder case, which somehow proved he wasn’t guilty. But in this case if the glove doesn’t fit it means there will be murder.

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