Wangy is taken from Indonesian word wangi which mean smells good, but "wangy" is mostly used to indicate someone is sniffing their girl/idol/waifu in a perverted way. Like how Darth Vader or an ugly bastard from an ero doujin breath
The term often used in combination with "brownies, no nuts" and "peace baby" by a certain teacher in a certain all-male catholic school in a certain town called mineola on long island, to denote an amazing feeling of eating massaro's buffalo wings
"Dalty, wingy wings... niceeeee... wingy-wings and brownies, no nuts. combo baby!"
A deeply Southern reference to an unusual flavor; if the taste is not sweet, not sour, not tart, or even bitter on one's palate, it is definitely whangy.