The Real Ghostbusters S07 E02 Not Now, Slimer!

"Who you gonna call? Ghostbusters!"

Slimer has been pestering they guys too much and they finally snap at him. He sulks off to the attic, just as the Ghostbusters are called out on a mission. When a powerful ghost heads for the firehouse to destroy it, a despondent Slimer is the last line of defense!