Shennani-grins

Sneaky and chaotic fun that is intended to brighten other people's day, but does no harm and is at no one's expense.

Anyone up for shennani-grins? We should go do some google-fiti downtown and try to help people smile. Maybe we can find a beer cock to decorate!

by kinkybabysteps December 9, 2021

Meat Grin

A grin that is full of nasty food particles.

" Sally just looked at me after eating her sandwich and she had a meat grin; Food was all stuck up in her braces."

by PlasticSheep December 16, 2008

Diesel grin

Having a noticeably poor mouth hygiene to the point of blackened and/or rotting teeth, associated to damaging activity like siphoning gasoline from a vehicle or hard drug abuse. See also Meth mouth.

Hey bro, that girls checking you out.
There ain’t no way I’m going near that diesel grin!

by Master Tricon September 17, 2025