In reference to a person (usually a male) who has gone a long period of time without engaging in sexual intercourse and has as a result returned to being a virgin.

In the wild, the Black Rhino spends the majority of its adult life alone and mates only once every 2-3 years.
Me: When was the last time you had sex Maurits?

Maurits: Its been like 8 months.

Me: Haha, you're a black rhino.
by The Whitest Rhino April 17, 2019
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When you pooh on someones face in such a way, that it looks like they have a large horn.
Mr Parish was administered a Black Rhino. He loves the horn.
by Ricktus January 28, 2004
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the black rhino is when you take a black dildo and strap it to your forehead and then ram it into your partner, generally into the women's ass. the reason for that, is cause that is the funniest way this move can be performed.
performing of the black rhino can not be considered cheating
a. cause you are using an inanimate object
b. cause of the extreme hilarity of the move
i took a black dildo and strapped it to my forehead and then rammed it into sally's asshole and gave her the black rhino.
by man candy January 15, 2007
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the black rhino is when you take a black dildo and strap it to your forehead and then ram it into your partner, generally into the women's ass. the reason for that, is cause that is the funniest way this move can be performed.
performing of the black rhino can not be considered cheating
a. cause you are using an inanimate object
b. cause of the extreme hilarity of the move
i took a black dildo and strapped it to my forehead and then rammed it into sally's asshole and gave her the black rhino.
by man candy January 11, 2007
Get the black rhino mug.