Filter episode 

A 'filter episode' is an episode in a series that doesn't quite add anything to the storyline or have anything to do with the main plot. It is merely an episode that appears to be something to lengthen the series, or an episode that is used because the producers have run out of ideas and do not want the story to conclude just yet.

Example 1:
Jeff: "Dude, yesterdays episode was crap! It didn't even mention what happened last week!"
Ken: "Must've been a filter episode"

Example 2:
Stacey: "Ugh, another filter episode! When are they going to continue the story?!"

Filter episode by Teenage Dirtbag xo August 31, 2013

filler episode

A day where nothing special or exciting is happening.

“Today is such a filler episode.”
“I know right? Nothing new.”

filler episode by Maciii August 30, 2022

filler episode

Every episode of The Office

Bro 1: Hey did you see the new episode of 'The Office'
Bro 2: Yeah it was such a filler episode

filler episode by Bbbobert November 21, 2022

Filler Episode

An episode of a show where nothing of relevance is actually going on in the episode. Filler Episodes are usually made to keep viewers with content to watch while they think of new ideas and more time to make episodes relevant to the plot.

“I might stop watching this shit, there’s so many filler episodes.”
“Yeah I know right it’s actually ass.”

Filler Episode by J4VA January 3, 2023