Itchy ass. What happens when you insufficiently wipe your dirty buttocks. The itch feels like you have tiny little spiders running inside your hiney hole.
"Dude, get your hand out of your ass!"
"Sorry, I can't. I've got massive spider hiney."
"Ewwww...."

by Purple Helmet September 23, 2005
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When your ass is so saggy that it pushes up against your thighs and creates a second smaller ass between your first ass and thighs.
"I'm self conscious in a bikini because it shows off my second hiney"
by BatShitCrazy87 July 21, 2015
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The area of skin that separates a woman's vulva apart from her butthole.
"Omg Brad, I'm so sorry about all of that pubic hair on my hiney-hoo!"
by lolimanidiot827366 January 19, 2016
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A Hines five is an open handed smack on the ass. Like a high five but on the butt.
She gave such a good blow job when she turned around to go clean up I gave her a hiney five
by notmeinkc May 3, 2022
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Not a real hiney, but one made of paper... speaking but not making any sense about something.
"You talk like a boy with a paper hiney!
by smoocharoon October 11, 2017
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The anus of the rat. I don't give a rat's hiney means I don't give a shit, I don't care, it is the same to me, it is not my business, something that is careless
I don't give a rat's hiney if I lose my job.
by willymon October 11, 2012
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