Could only get an eighth, I'm tryna roll up, turn up
(You made a monster out of me)

from XV (Ft. B.o.B & ScHoolboy Q) – AaaHH!!! Real Monsters Lyrics on Rap Genius

Meaning

Most drug dealers try and get rid of their stash by selling them by eighth ounce increments. 1/8th usually costs about $50-80 bucks. He could mean that the weed made a monster out of him, and how he eventually became a gang banger of sorts.

Q changes the theme of the song in his verse from that of XV’s, (which took into account factors such as past relationships and record labels), by rapping about his mother, implying that he was born and raised as a monster.

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