But I kill shit for that pound cake
Money talk and that sound great

from XV (Ft. Freddie High & Sez Batters) – Got This Year Lyrics on Rap Genius

Meaning

Cake is often used in rap to reference money, as it is here. Freddie says he kills shit for that pound cake, meaning he raps to make a living.

He also adds some wordplay off the old saying

Money talks.

so if money talks, he’s liking what he’s hearing.

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