A Full Ethiopian
A full Ethiopian is when you pretend you saw something ridiculous to make someone feel stupid.
You: 'I just got a promotion!' Me: 'Oh yeah, I saw a full Ethiopian in the elevator.'
Friend: 'I just won the game!' Me: 'Oh yeah, I saw a full Ethiopian trying to cheat.'
Mom: 'I just got a new job!' Me: 'Oh yeah, I saw a full Ethiopian in the interview.'