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1.
someone who is a virgin of the ass.
After George Bush Jr. fucked Freedom in the ass Freedom is no longer a nigriv.
by Omar Offbeat April 08, 2008
 
2.
A person that has had sexual intercourse, a non-virgin
Friend A: dude you had sex with her?
Friend B: yup! I'm a nigriv
by Prunilla January 20, 2013