To cry

or, to nearly cry

or, to try not to cry but come very close
She got told off by the boss and went off for a lip quiver.

When he said I was his best friend I had a little lip quiver.

I didn't burst into tears but I did have a quick lip quiver.
by TheWeirdnessSymposium February 26, 2009
Get the Lip quiver mug.
The female perineum or taint. The area between the brown eye (balloon knot) and the whispering eye.
by Pistol_Pete12 January 24, 2011
Get the Quivering Lip mug.