sprinkler time 

A term used in the popular Youtube live streaming channel, GT live. It means the time in which the sprinklers turn on. It was made so that the hosts, Matthew Patrick and Stephanie Patrick wouldn't forget to check whether their sprinklers were on or not.

Steph: Wait, everyone stop!

Mat: ...Why?
Steph: It's Sprinkler time.
Mat: I'll check if the sprinklers are on!

sprinkler time by ssandlebaram July 21, 2017