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

3 Words Related to Mood killer

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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