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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
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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
Related Words
There is no anus more famous than Swanus,
Swanus by bumptiousdood January 19, 2010
Origin: A portmanteau of sweats and jeans.

Sweans are an invention of the fashion industry in the 21st century originally designed as a hip substitute for "Mom Jeans". They offer the comfort of sweats without the "give up on life" attitude. Due to their tight fitting nature, sweans are not regarded as pants in some parts of the world. Not to be confused with swean.
That girl has one hella tight pair of sweans.
sweans by Quetzalcoatlus March 25, 2014
Boy T- i sweenus all the time everyday.
sweenus by attack12345 November 13, 2009
Having, or relating to a sweaty anus.
Man it's so hot today I got a mad case of swanus.
Swanus by Sean November 15, 2004
Seanus is quite cute.
Seanus by Mer October 17, 2003