Single ride paid, they start to raise
I go under, I gotta tell you I ain't got the change

from Wiki (Ft. RATKING) – Wikispeaks Lyrics on Rap Genius

Meaning

Subway fare is rising and Wiki can’t afford it, so he sneaks on and hides underneath the train. Hard core fare evasion.

No, but actually he goes under the turnstile (didn’t even know it was called that)

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