Any song sung at a Karaoke show that's so depressing it makes the crowd want to slash their @#&*%$! wrists, especially if it follows a fast, happy, crowd-pumping song. A wrist-slasher has the potential to suck all the momentum and happiness out of an otherwise hopping, jovial, drink-buying Karaoke crowd, and usually sends half of the patrons out the door.
Joe just sang "Late in the Evening" by Paul Simon, and now Marc is singing "Whiskey Lullabye!?" Who the Hell wants to hear that wrist-slasher!? C'mon, let's pay our tab and let's go!