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An depressing person. One whose presence tends to darken others' moods, consistently.
We were having a great time, until the buzzkiller arrived and started whining about his dating troubles.
by tlc August 27, 2003
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Apr 14 Word of the Day
That moment when you think a bug is crawling on you, and it turns out to be true. LMD

A FML moment. LMD

Pretty much you go, JUST LET ME DIE!

Wish this never happened. LMD
by misspinkyperfectionnnll July 09, 2011
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Some one who kills your mother fucking good time.
For example, the cops, your parents.

Man that cop was a really buzz killer!
by RockinThatShit June 30, 2008
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