Top Definition
When someone comments on a facebook post (status) and totally kills it for anyone else wishing to comment or like.
Somone posts about a crazy party they were at the previous night, and one of their friends (often an outcast or parent) posts about how they shouldnt be doing things like that about the totally boring night they had at their house, a total post kill.
by chillwords 356 January 01, 2011

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