>>18824335 (lb)

>Cover down? Should be cover up

n. 1 concealment or attempted concealment of a mistake, crime, etc.

https://dictionary.reverso.net/english-definition/cover+down

Cover Down This is a military term for aligning yourself in formation with the person in front of you, so that when viewed from the front of a formation you all are covered and aligned correctly.

In the vernacular, to cover down means to get someone's back when they fuck up.

https://www.urbandictionary.com/define.php?term=Cover%20Down