She was my date to the sock hop
I knew my time tables, plus I knew how to pop-lock

from Murs (Ft. 9th Wonder) – Baby Girl (Holding Hands) Lyrics on Rap Genius

Meaning

A “sock hop” was an informal school dance that was commonly held in either the school’s cafeteria or gymnasium. It was called a sock hop because students were forced to take off their hard-soled shoes in order to avoid damage to the hard-wood floors. So, they would pretty much be dancing around in socks.

“I knew my time tables” refers to his ability to multiply. So he was good at academics as well as having sex.

“plus I knew how to pop-lock” refers to a form of dancing that requires to dancer to rhythmically contract his/her muscles to the beat of the music. Usually danced to funk or hip-hop music. Murs was busting dirty moves at the sock hop.

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