Definitions by miss G'(ya'll kno')

jaw lock 

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

jaw lock by miss G'(ya'll kno') July 15, 2006