I really want to break my jaw, any suggestions for how to do this?!

Best Answer - Chosen by Voters

1. Go to a club
2. Find an angry black guy
3. Call him the n word
4. Run outside the club and lay face down on the curb!

Well it depends on what type of fracture you are going for. Also which bone do you want to break? You have your choice of the maxilla or the mandible.
If you want to fracture the maxilla you could consider a high speed car collision with no seat belt. You stand a chance to fracture the maxilla, the zygomatic arch, the orbit, and the mandible really. And that's just the beginning!
If you want to fracture the mandible you could fall forward chin first into concrete. That will push the condyles of the mandible so hard into the skull that you could have a bilateral condylar fracture. Good times!
If you want to shatter the ramus of the mandible have someone hit you with a pipe right in front of the ear. If you want to shatter the body of the mandible, let someone hit you using brass knuckles.
Now let's say that all this violence sounds too "icky" for you. Why don't you schedule a visit to an oral surgeon and have him do an osteotomy wherever you feel you need one.

Ah, so many options for just two bones :)

I am a dentist

Make an appointment for the dentist on the day you want to do this. Make sure the dentist uses something to numb your face. After the appointment, before the numbing wears off, smash your face on something strong and hope for the best.

Tell your friends to throw hammers as hard as they can, directly towards your mouth. & hey, you get a little bonus too, broken teeth.

This is the stupidest question..
Why in the World would you wanna BREAK your jaw???

Get a dinosaur to chase you.