A)
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 ?"
B)
Urban Dictionary's inability to recognize identical terms with minor spelling variations is such a buzz kill.