Lack of Respect
Calling your friends liars when they’ve done everything for you and you’re too lazy to even thank them.
My best friend helped me pass math, and I called him a fake. I failed the test. He got an A. I got a D. I’m a dumbass.
She paid for my pizza and I said she was lying. I’m full. She’s broke.
He lent me his game and I said he was a cheat. I lost the game. He got a new console.