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Sweanus.....after a workout, or hot summer day, or some steamy intercourse, the moisture that develops in the crack of your ass, is called, sweanus. More often than not, it refers to someone in the negative....because they may have actually just not showered in days, therefore creating a funky odor from 'back there'. Combines the two words sweaty and anus.....sweanus, VOILA!
Scene: Walking down the street with your friend, behind someone with a line of moisture on their pants (ya know, on the 'fault line'):

"Hey man, check out the sweanus on that back".
sweanus by MikeyRo September 26, 2006
Related Words
Really salty peanuts.

Reasons:

'PEA' nuts rhymes with 'SEA'nuts.

Salt is commonly found it the SEA!

It's just logic.
Man 1: Hey, wanna peanut?
Man 2: Sure..

Man 2: Woah, these aren't just peanuts bro, they're SEANUTS!
Seanuts by EmmetPugjjj June 11, 2013
Derived from 'cunt' where deliberate misspelling to 'cnut' is used to bypass online smut filters. A more polite way of calling someone a 'cunt'
It had to be said, Ben is a seanut.
seanut by Benny Ritoza October 16, 2007
The uncomfortable feeling of a sweaty anus, usually experienced by those working outside during a hot and/ or muggy day.
Man, I can't take it anymore! I can't wait until break and then I can go take care of my terrible case of sweanus!
sweanus by avaraxus January 22, 2008

Seanut Brittle 

An object from the show "SpongeBob SquarePants". It is a practical joke product disguised as a can of food sold exclusively at the Palace of Pranks. It appears in the Season 3 episode "Pranks a Lot" as one of the pranks sold by shops owner, Frank.
Oh, boy, Seanut Brittle. Gimme!