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Function: Noun
Etymology: Portmanteau of shame and anus.

1. a: Judging the anus to be obscene b: the susceptibility to such feelings.

It came about as a result of the anus being photoshopped out of many images of female nudes across the internet, and the lasting psychological damage it caused on the women thus depicted.
The shanus Suicide Girls models must feel right now must be palpable; how awful to be buttholed by both their own website and the FBI.
shanus by Alana Post September 30, 2005
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It is the condensed form of "Shotgun-Anus" where when two guys are planing on having sex with the same girl and while they are working out the logistics one calls "Shanus" thus securing their right to dibs on her anus.
Andrew: "Wow Kourtney is looking really hot tonight!"
Brian: "Yea man lets tap that"
Andrew: "SHANUS!!!"
Brian: "Darn, I wanted to do her in the butt first!"
Andrew: "Sorry man, maybe next time"
shanus by Jane Doe Doe October 20, 2006
Related Words
Girl 1- this guy last night has no hair on his butt... like at all
Girl 2- yea. he's rockin' the shanus.
Shanus by sarahnau June 4, 2011
The act of being gay and touching ppl alot
Shane, ur acting shanus today
Shanus by Arab Unit January 12, 2004
Shart originating from the inner anus. Fecal matter residing just on the outskirts of the rectum.

See "shart" on urbandictionary.com also.
I need to go clean the shanus from my pants.
Shanus by BlakeS September 2, 2008
I was (bum digging) Walmsley the other day and she’s got such a Shanus

I got 99 problems but a Shanus ain’t one, if you’ve got a shitty anus I feel bad for you son
Shanus by Cri Cri W July 8, 2019
Guy 1 - Bro did you fuck that Chick last night?

Guy 2 - Yeah man her ass was like throwing a hot dog down a hallway.
Guy 1 - oh no shanus syndrome
Shanus by Banga81 March 9, 2015