What is Diyw?
Do it you won't. Slander to instigate a fight, drinking, bet, etc.
Person #1- Man i could chug like a whole fifth if I wanted to.
Person #2- Do it you won't. (DIYW)
Person #1- Chugs the fifth.
Group of people- all is well and fun.
See bet, dare, challenge, duel, fight