The smell of both sweat (body odor) and a smell related to the butt area. The combination of the words sweaty and ass. Can also be used as swasty
John smells a disgusting odor of both sweat and ass wipe coming form Alex and whispers to his friend Dan ¨ Damn nigga you smell dat swass?¨

John:¨Alex smells swasty¨
by Dont let your memes be dreams December 1, 2016
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Sweaty Ass. Also can use "sw" for sweaty balls, ass crack, asshole, testicles, vagina etc. (swalls, swasshole, swesticles,swagina)

Can also be used as an adjective "it is swasstastic outside".
Man this humidity is giving me major swass and swalls bro, need to change my undies.
by Pavelski8 July 7, 2012
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having a sweaty ass
dude your dripping your swass on my couch
by Reba the Ruler August 8, 2010
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The sweat that that builds up between one ass cheeks.
Heat and humidity are major causes of swass.
by Discomfort one July 22, 2013
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The word is derived from the term "swamp ass" (not 'sweat ass like some have been led to believe). The term is, however, defined as "sweaty ass".
Man, I would like to go out to eat with you guys, but after the softball game I really developed some SWASS, so I have to go home and change first.
by Denney June 9, 2006
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I've been moving furniture all day in this heat and have total swass.
by Aucado August 8, 2012
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