Top definition
Someone who can ruin your mood extremely quickly without attempting too. They just have a certain style or attribute that kills moods.
Omg, that guy Teji is such a mood killer. Like i was going to ask this girl to the dance, he randomly came in and asked for a condom.
by Saini Swag December 09, 2011
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Jul 7 Word of the Day
When you're being horny (especially around friends) and as a result shame ensues.
Friend 1: "Aw man, I could totally fuck a catgirl right now.."

Friend 2: "That's it, you're going to horny jail."
by Blysterz October 19, 2020
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2
People or things who absolutely ruin your perfect vibes.
Examples for mood killers:
- When you close apps and accidentally close Spotify

- When you‘re gaming with the boys and your mum tells you to do the chores
- When you drop your toothpaste

- When your mum yells that the food’s on the table but she straight up lies
by A1RMAX June 10, 2020
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3
someone or something that changes the mood of the environment ie. kill your high
Chaz:Dude I heard about this banging club downtown, reach my house and we'll take my car.

Brad:Alright I'm on my way.

(reaches Chaz's house)

Chaz:Hey whats up dude. Lets get in my car. I heard this club is crazy. So many bitches bro.

(driving to the club)

Chaz:You know what bro, I dont feel like going anymore.

(turns car around)

Brad:Your a fucking moodkiller bro.
by Sheki Shabaz March 29, 2006
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