While under the influence of Marijuana, the particular name given to a person who is annoying, sketchy, or just a plain dick. This can include making fun of people, calling them names, and ruining the whole experience.
God damn, no wonder everyone hates Alex Kraczek, hes such a buzzkill.
Jim:Alex whats up
Alex Kraczek: Shut the fuck up you bitch
Jim:Wow Alex Kraczek, you are the biggest buzzkill ever to live.