I was jerking off and then my dad walked in, god what a buzzkill.
1. Buzzkill, anything that takes the edge off your fluff, a downer, something that ruins your good mood; a killjoy.
2. (verb) to selectively and deliberately bring down someone's mood by actions that are designed to irritate, annoy or downright upset a person.
see also buzzkill
The protagonist experienced the ultimate buzz kill in "The Crying Game" when Dil removed -his- pants.
"Dude, I'm so high right now"
"yeah, but we just smoked the last of the weed and your girlfriend took our rent money to fix the dent you left in her car last week"
"Dude, could you be any *more* of a buzz kill right now ?"
Urban Dictionary's inability to recognize identical terms with minor spelling variations is such a buzz kill.
Person 2: No man we could get caught, I wanna go home
Person 1: Will you stop being a fucking buzzkill
Can also be someone or something that spoils the mood for just about anything.
So, I'm talking with a few diffrent people on MSN Messenger, alternating between them. We've all got interesting, intelligent conversations going. Anyway, suddenly one of them chews me out because he feels I'm not giving him enough attention. He totally killed my mood. What a buzzkill.