It's the " permanent grin " you receive when you're stoned.
" Man, my cheeks are sore. I had a perma-grin for about an hour. "
18๐ 12๐
"Why are you wearing that awful looking hat?"
"For grins and giggles."
5๐ 2๐
To do something for know reason than to have a laugh.
Jo: lets go and see that new film.
Jake: why?!, its crap.
Jo: Just for Shits and Grins.
30๐ 26๐
The evil smirk you have on your face when you are at a stoplight and another car pulls up to your side, and you both rev your engines, signaling each other to a drag race duel as soon as the light turns green.
Ken: Haha, look at that guy, he just reved his engine, I think he wants to race me. Look at that evil grin on his face!
Mark: Yeah, he has some serious rev-grin going there!
6๐ 3๐
A photo op or other media event in which a famous person shakes someone's hand for the camera.
"Attention Pacific Northwest stalkers! I'm doing a grip-and-grin with contest winners this afternoon at the Puyallup Fair." -- "Weird" Al Yankovic (@alyankovic) on Twitter, Sep 26, 2009
"Grip and Grin" (slideshow title), TIME Magazine, 2006
6๐ 3๐
A permanent way to turn that frown upside down; take your depressive/emo/irritating bastard, shove a credit card or similar object into his gob so that it separates his jaws, and carve two curving lines from each edge of his mouth to as close to his ears as you can get without cutting into bone. The results will put a smile on every dial. Especially the staff at the emergency ward.
'Turn that Fall Out Boy crap off before I give you a Glasgow Grin!'
47๐ 52๐
An automatic and irremovable smile that appears on the face of people who are thoroughly intoxicated with some narcotic; usually marijuana, hashish, mushrooms, or lsd. Can be found in other cases such as on television morning news anchors, beauty pageant contestants, pop queens, and mental patients.
"Look at Greg! Dude has Perma-grin! That must be some good shit!"
22๐ 22๐