Lay it down, homie you'll get out-rhymed
On the track, or flat on your back, you'll get out-lined

from Wiz Khalifa – Bout Mine Lyrics on Rap Genius

Meaning

“You’ll get out-lined” is a double entendre:

1) Figuratively: Wiz will kill you lyrically. His rhymes and rap lines > yours. Hence “out-rhymed” and “out-lined”.

2) Literally: He will kill you. When somebody is murdered, police outline the body at the crime scene in chalk.

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