Most have witnessed the Cud in the club

from Kid Cudi – Wild'n Cuz I'm Young Lyrics on Rap Genius

Meaning

Most people have seen Cudi in clubs. Along with the previous line, this refers to the popular video of him sloppy drunk falling down in the street outside the club.
http://www.youtube.com/watch?v=48r7cA8Dk8E

This line could refer to his hit song day n nite which was remixed by a DJ duo’s The Crookers upping the success of the song (I prefer the original personally) which was played throughout nightclubs especially in hot locations such as Ibiza.

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