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"
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"
by Jane Doe Doe October 20, 2006
by 🦋💙💙💙 January 23, 2022
It's all about the Shanus.
by The chocolate deer January 12, 2016
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
Guy 2 - Yeah man her ass was like throwing a hot dog down a hallway.
Guy 1 - oh no shanus syndrome
by Banga81 March 09, 2015