But I didn't cross the line until the bridge hit it, troll

from Earl Sweatshirt (Ft. Tyler The Creator) – Couch Lyrics on Rap Genius

He was always messed up, but he never went too far until the bridge of this song (the bit between his verse and Earl’s) hit. This is a play on words, as in fairy tales trolls lived under bridges. Nowadays, trolls live on the internet and feed off your rage.

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