Memphis, Tennessee no, see I start to go deep back
And Ridge Crest with my seat back with Yo Gotti and E-Mack

from Drake – Underground Kings Lyrics on Rap Genius

Meaning

Drake’s father is Memphis drummer Dennis Graham, and a young Drizzy spent summers in that city with pops:

I’d never fly to Memphis; my dad would always pick me up in Toronto and we’d drive, and it was like 21 hours,“ says Drake. "On that drive he would just play me the greatest music, and then bring me to Beale Street and drive around the city, and I started to understand what it was about Memphis

It’s really the first place that I discovered what I love about music, which was the soul, the melody and the message in the lyrics

Ridge Crest is a Memphis housing project where rapper Yo Gotti grew up. Gotti’s official bio talks about the area:

Ridge Crest housing projects area was not always an easy life style, after all this area is well known for it’s [sic] crime and more so the gangster ridden neighbour [sic] hoods

The “E-Mack” here may refer to Memphis rapper Mac E, though we can’t confirm that

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