Y'all can't stop me
Go hard like I got a 808 in my heart beat

from Macklemore and Ryan Lewis (Ft. Ray Dalton) – Can't Hold Us Lyrics on Rap Genius

Meaning

A Roland TR-808 was the first affordable programmable electronic drum kit, essential to the rise of hip-hop. It’s known in particular for its deep bass drum sound

http://www.youtube.com/watch?v=jUx7ax62OBo

This is also a play on the title of Kanye West’s fourth studio album, 808s & Heartbreak.

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