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1. A side-effect of chronic cocaine use, causing your mouth to clamp stuck.

2. A girls mouth getting locked open after giving a blow job for an extended time.
"I took way to much coke and now I have lockjaw"

Guy #1 "Aye bro I gave Jessica and Tammy lockjaw last night"
Guy #2 "Damn son"
by Veni Vedi Veci September 07, 2016
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2
refering to and/or caused by a person giving another person hed; they are usually in the position so long that there jaw just kinda gets stuck hanging open and will not shut for a series of hours
Quit sucking my dick. You're going to get lock jaw.
by Ben fuckermother August 26, 2003
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4
When you are eating pussy and you have been at it so long that your jaw and your mouth begin to cramp up.
I ate Jodi's pussy for so long that I started to get lock jaw!
by GoatPeople September 18, 2009
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5
When high on ecstasy
your jaw locks up from grinding your teeth
Lisa got lock jaw when she was on E
by L. April 20, 2005
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6
Lock jaw or tetanus(correct spelling lockjaw) is where your jaw locks in an open position due to your chewing muscles spasming. You can get it by a wound that gets infected with it.
I got bit by a dog and was afraid i met get lockjaw so i had to get a tetanus shot.
by Red Dog July 29, 2005
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7
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)
by Bic August 20, 2016
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