Came in a lane and made paper off of Seinfeld
Enthusiastically curb,

from Wale (Ft. Chinx Drugz) – Let A Nigga Know Lyrics on Rap Genius

Meaning

Seinfeld was called the show about nothing and two of Wale’s mixtapes were heavily inspired by Seinfeld: The Mixtape About Nothing and More About Nothing

Both of the mixtapes samples extensively from Seinfeld, and there’s a lot of references to catch phrases from the series. Came in a lane is wordplay for came in Elaine, who is one of the main characters of Seinfeld.

The final episode of the seventh season of Curb Your Enthusiasm (enthusiastically curb) is called Seinfeld, and revolves around a fictional Seinfeld reunion show featuring the original cast.

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