To snee means to suddenly push air out of your nose and mouth to clear your nose.
Sneezing is usually a sign that someone is sick or has allergies.
Examples:
I snee when I have a cold.
She snee because of the flowers.
He snee very loudly in class.
The cat snee and scared the dog!
I snee a million times a day when I'm sick.
The baby snee and everyone laughed.