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1.
A snoo is a long-nosed mythical creature, rather like a cross between a shrew and a nose and a poo. Shy and quiet, they like to stick their snouty noses in the grass to snuffle for truffles.
I saw a snoo the other day, I can't be sure, it could have been a shrew.
by bunny_lover January 02, 2011
 
2.
Kinda like a shart. But in this instance the motion emerges as a result of the muscle change caused by a sneeze, hence the name: sneeze + poo = snoo.

Hard to believe possible I know, but I've seen it happen. It was awful.
*Al enters office from adjoining warehouse looking gleeful*

Al: "You're not gonna believe this... Jay just had to go home!"

Shezzer: "What? Why?"

Al: "He just snooed!"

Shezzer: Gross! That's a food-safe environment...
by GuacamoleSoup October 01, 2014
 
3.
Participating in a sexual encounter with a goat. Essentially beastiality, but with a goat.
"Dude, he totally snoo'd on the weekend!"

"I know dude, so did I! Best snoo ever."
by YouBeenSnoo'd April 08, 2014
 
4.
To rub noses with either a partner or lover, or a much loved pet animal, in an affectionate way, like the Eskimo kiss but with more gentitlity- unless it's a 'woodpecker snoo', which is a much faster, slightly more aggressive (but still pleasurable) action. Can also be the pet name of the person you regularly do it with.
"Oo oo oo, I wanna snoo with you"

"You are my snuvverly snoo"

"Snoo with that flibbly woo"
by Herr Metaaaal December 12, 2012
 
5.
A real creature, they are close relatives of the Blobfish, though Snoos do not live underwater, but in fact on top of the clouds. Literally. There are many different types of Snoos, like the Snooba family (Snoobini, Snoobette), Snooshie family (Snooshette, Snooshini) and the Flob family (Flobette, Flobini).
The Snooba family have large noses, blue and purple birth marks, pimples, moles and freckles. They are a pale pink, to reddish pink, to peach pink to salmon pink. Snoos live in Helvenworld, where there are many cities, towns and states, most of them named after Snoo families. The capital of Helvenworld is Helvenville, in the state of Helven.
Ylil: 'Gosh, this trip to Helvenville's taking ages!'
Enirehtac: 'Why of course it does! It's all the way up in the clouds! Read a book if you have to.'
Ylil: 'Wow, the Snoos must get car sick . . .'
by Germah Horltott April 16, 2011
 
6.
Have sex. ;)
Wanna snoo??
by Sexaddict1 March 06, 2012
 
7.
Part of an idiotic, corny, and wonderful joke.

"Man, it feels good to get out of the snoo."

"What's snoo?"

"Oh, not much...what's snoo with YOU?"
There sho' nuff is a lot of snoo in this here freezer, boy.

See also updog and upwitchu.
by shintriad July 06, 2006