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1. difficulty or pain in opening ones mouth due to a medical condition, injury, or infection

2. an upper class accent
If you keep chewing your nails like that you could get lockjaw.
A song referring to your jaw locking by grinding your teeth while on some flame mols mdma
Girl : CHILL DUDE OR YOUR GONA GET LOCKJAW
Boy : F YOUR RIGHT IM ROLLING SO HARD

Girl : YEA ME TO THIS SHITS FIRE
Boy : WORD
Girl : WORD
Boy : YOU WANNA FUCK
Girl : SURE
(Skrrrrt)
Lockjaw by Bic August 20, 2016
A slang term for the people and accent from New England and Northern America. Coined from the fact that many people from these states mumble and, compared to a Southern Drawl, keep their mouths relatively closed when they speak.
I knew he was from the North when I heard him talk with that lockjaw.
Lockjaw by TallBuns July 5, 2011
I got a whole lotta lockjaw with me, but it's too bad half already in me
Not being no snitch
Nah bruh I ain’t no snitch. I’m lockjaw when the cops pull up”
Lockjaw by No snitches May 31, 2018
You explain yourself too many times to too many people and it just feels like you’ve talked too much and you’re stuck repeating it
I’ve explained my problems to everyone and now I feel lockjaw
Lockjaw by Susasfeagle February 23, 2019