I took a pill and went to sleep on the last step

from Ed Sheeran & Yelawolf – London Bridge Lyrics on Rap Genius

Meaning

He popped a sleeping pill (probably Valium) and fell asleep on the hard concrete steps.

Could be a subliminal reference to Eminem also. Em had a sleeping pill addiction only a few years ago, and Yela just got signed to Shady Records

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