Facebook Bet
Friends bet. The loser doesn't pay cash. They get stuck with a friend's face as their profile picture. The face is picked from a 2 by 3 grid of friends. The loser has to keep it for a while. One refresh gives them a second chance to escape.
I bet my friend $10 I'd eat a whole pizza. I did and now he has my dog's face as his profile picture. That dog's face is terrifying.
My cousin bet me I'd fail my math test. I did and now he has my uncle's face as his profile picture. That's like a horror movie.
My mom bet me I'd clean my room. I didn't and now she has my brother's face as her profile picture. That's like a monster.