See how I was flowing on my last cassette
Rapid-fire like I'm blasting a Tec, never jam though
Never get hot, never run out of ammo

from Jay-Z (Ft. Amil & Jaz-O) – Nigga What, Nigga Who (Originator '99) Lyrics on Rap Genius

Meaning

His flow is fast and powerful like a Tec machine pistol. Occasionally when you spray a machine pistol, it can jam, the only thing Jay’s flow doesn’t have in common with a Tec.

Don’t you hate it when your mag jams?

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