It's monster shit, you dudes are the opposite of Loch Nesses

from Childish Gambino – Freaks and Geeks Lyrics on Rap Genius

Meaning

Gambino is doing big (monster) shit, these other guys are not doing anything close to his level. What’s the opposite of the Lochness Monster? A gerbil.

The Loch Ness Monster

Also, he’s a mystery while everyone else is figured out.

The Loch Ness is a very deep lake. If you are the opposite of Loch Ness you are shallow, whereas Childish is deep.

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