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
Some one who kills your mother fucking good time.
For example, the cops, your parents.

Man that cop was a really buzz killer!
#bk #bitch #fucker #loser #asswipe
by RockinThatShit June 30, 2008
Someone who fucks up when you are having fun.
Damn it Pranjal, You are such a buzz killer!
#buzz #kill #fun #time #fuck #damn
by GodFreak July 27, 2011
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