1. childish euphimism for buttocks
Possibly from the German word "hinder" (to prevent) as in prevent ass kickings; cover your hinder.
2. an overpriced beer from Holland
Your skid marks and itchy butt don't just happen kids. You need to wipe better. Don't wipe your heiny with your underpants!
Hey dere, why are you drinking Heiny? Doncha know that the best beers in the world are made made in a Merica?
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Heini means "fit" in Welsh. Welsh Heini's are fit, as in athletic and fit generally. They are bright and bouncy too, although given to drinking too much on occasion, and walking oddly when drunk and in heels. In essence, a floozy in a onesie.
Welsh Guy 1: W yli ma'r hogan yna yn heini (Eng: Ooo that girl's fit)
Welsh Guy 2: Ond mae hi'n cerdded fel y Grinch (Eng: Ye but she's walking like the Grinch)
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A very cool girl who is an amazing friend. Heinis typically take in the weird introverts and collect them into their friend groups, they are kind and smart and everyone likes them.
Person 1: Oh my god, that girl is awesome!
Person 2: Yeah! She's such a Heini!
A pompous word describing the tush of any animal. It it used to declare someone stupid, or unwittingly dumb.
Stop messing around with your pencil. You're being such a heinie.
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A usually itchy part of the body, generally the source of diarrhea and other fine substances.
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