When your mouth gets stuck open after having sex.
Sippin' till my heart stop and my jaw lock
I just made her jaw drop from a backshot
by juicewrllld999 December 1, 2020
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when ur mouth or jaws get stuck open after giving head
or very hardcore sex.
Basically its the same as a rim jaw.

she was in the hospital due to a terrible accident w/ her japper jaws -ha ha- she had a jaw lock for 2 hrs str8!
"U'R such a Japper Jaws" --ha ha
by miss G'(ya'll kno') July 16, 2006
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sucking dick so long till your jaws lock
“i’ll suck him up till my jaws lock
by tnxtdoor April 23, 2023
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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 27, 2003
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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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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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