Top definition
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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2
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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3
Someone who fucks up when you are having fun.
Damn it Pranjal, You are such a buzz killer!
by GodFreak July 27, 2011
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