"You'll never win" is probably my favorite taunt in the game. Super short so you can spam it incessantly, sounds so high-pitched and obnoxious, and it's even better if you're teamed up with someone ridiculous like Sackboy who just got an insane level 3. After the super ends (since taunts don't seem to make noise during supers), spam "You'll never win!" for the rest of the match, and they'll sadly know that it's true because Sackboy just gobbled up 2000 kills. XD
If I haven't mentioned Trivio in my post, it's because she is so beautiful and precarious that I just wanted to show her how much she means to me.