The sound a horse makes instead of a neigh, at least according to Spongebob Squarepants.
Found in the episode My Pretty Seahorse, where Spongebob finds Mystery the seahorse.
Mystery: neighhhhhhh
Mr. Krabs: What was that?
Spongebob: Just practicing my impression of Mystery, Mr. Krabs! Weesnaw!
Get the weesnaw mug.
Spongebob : No Mr. Krabs.. that was uhh just me doing my imitation of Mystery. Weesnaw.

Mr. Krabs : Well then.. keep working on it,cause it's terrible.

(Those probably weren't the exact words but it's as close as I can remember.)
by shuffles August 3, 2006
Get the weesnaw mug.
Depends on the region of the United States. In the South and Middle America, it is an unmentionable body part. In the West it is a mythical sea horse. In the East, it is an exclamatory remark. It can also be used as a term of affection.
In the South: Uh oh, my weesnaw is really hurting. I better go get this checked out.

In the East: Weesnaw!! The sox won again!
In the West: someday, I hope to catch a Weesnaw.

As a term of affection: I love you my Weesnaw
by Snawlover September 5, 2015
Get the weesnaw mug.
jessie: did you get tickets for weesnaw yet?
josh: yeah and since i preordered, i got a pair of horseshoes, too.
by josh alan December 21, 2008
Get the weesnaw mug.
Everyone seems to associate "Weesnaw" with that Spongebob episode with the pet seahorse Mystery. But there's also a scene from an episode of an old Winnie the Pooh cartoon series with the word "Weesnaw". In that scene, Pooh and his friends are in the grocery store, when Eeyore tests out a ball horn that makes a loud "weesnaw" sound, and the grocery store clerk says:
"Weesnaw? We don't sell any Weesnaw!"
by Pooh Bob October 18, 2019
Get the Weesnaw mug.
A word used to express your love for spongebob, and horses more specifically sea horses
Cant wait to hop in that bed and pound that girls weesnaw
by Hoe Slayer Nibba Player February 20, 2018
Get the Weesnaw mug.