People whose moods are utterly impossible to predict.
Going to visit Mike , wonder which number of mood roulette he'll be on today?

Becky just broke up with Steve again, should be an interesting game of mood roulette tonight!
by AustenPowers77 June 3, 2016
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A mood disorder characterized by people getting grumpier and having a shorter fuse as they get older.
My parents are currently experiencing a mild form of age-related mood disorder
by Sexydimma January 26, 2015
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A mood disorder charachterized by people having a shorter fuse as they get older
by Sexydimma March 30, 2017
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An episode of a show on television that changes quickly, from tragedy to humor and back again.
Austin:Dude, did you see that new episode of HIMYM last night?
Cole: Yeah, it was kind of a mood swing episode.

John: It was really funny until Robin found out the news!
Austin: Then it got funny again at the end, so thats good.
*awkward silence*
Cole: yeah.
by DeionB December 8, 2011
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When you are in a tired, lazy mood that you would be in on the weekend.
"I'm in a Fraturday Mood", said the lazy child
by BBUUNNYY November 1, 2022
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When a Welsh guy ignores his friend for more than a month without texting, communicating or making any effort in clarifying misunderstandings.
Deiniol stonewalling his special friend for 6 weeks without wanting to meet up or communicating. He is clearly in his major Welsh mood.
by canto girl March 25, 2020
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