Shit's on the Horizon

A phrase used to express that something bad is on the way, or something terrible is about to happen, bad news, unfavorable situation developing etc

Shit's on the Horizon

worker 1) "Hey man, are you going to the game tonight?"
worker 2) "Yeah I hope to be....."

(Boss is making his way over)
worker 1) "Oh no, shit's on the horizon"

Lady 1) "Does the weather look like it might rain at our BBQ?"
Lady 2) "Lets just say the shit's on the horizon"