zero below zero 

An unnecessarily wordy term for the temperature zero degrees

I don't want to have to go looking for our dog when it's zero below zero outside.

zero below zero by misfo February 1, 2013

Subnautica below zero 

The sequel to the original subnautica. Still on 4546B, it takes place 4 years after ryley robinson (the main character of the original subnautica). Your space shuttle crashes in sector zero (hence the name). You are playing as a girl investigating the death of your sister while trying to not die.

Bro I almost shat myself playing Subnautica below zero because of that jumpscare.

Subnautica below zero by This_1-dude July 7, 2022

zero below 

A temperature reading of zero below zero.

Michael doesn't believe me that it is zero below in North Dakota right now.

zero below by One5 January 18, 2019

Below Zero Jitters 

Anxiety that starts in North Dakota winters when the sun starts going down, the temperature dives, and it's a 50/50 chance if your furnace will keep your house warm because it's too cold for it to function properly.

Now that the sun is going down, it's about time to close the shades and put up the window blankets to try calm my below zero jitters.

Below Zero Jitters by Emjoallen January 10, 2022