When people get really cocky.
Things like
"There's no chance of you winning."
"Nice try." or "Why do you even try?"
"You thought you would win? Stupid."
Also, when you're talking to someone and they're on their phone, then put their phone in their pocket, turn to you and say "What?"
Or if you're talking to anyone in general and they just ignore you.
Things like that make me all like