an act of opening your mouth in surprise /an involuntary act of shock .
kind of like yawning but not
"mom had a gaping mouth when i told her i didn't want an arranged marriage"
by skitttlessuck101 March 13, 2018
A mouth that is wide open.
Person 1:"lolemo"

Person 2:*mouth gaping*

by Waed Flup June 18, 2006
The permanent slight opening of the mouth due to being overstretched usually by multiple dicks.
I decided to push the limits of the suck fest by wanting a third dick added to my mouth once that happened I felt my mouth stretch. Oh great, I ended up with mouth gape. Now I can't stop drooling.
by lalaloveless July 28, 2016