Top Definition
a time in which two homosexual partners refrain from having anal sex
After fred took a vow of abstinence, he told his boyfriend he was on hianus.
by thedevionist January 22, 2011
1 more definition
5 Words related to HIANUS
To be one with no anus
Man, if you weren't hianus i would shove my foot up your ass!
by Sean June 26, 2002

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