a verb (that is a doing word), that can be used in a variety of ways, it is a multipurpose word. it generally means you are doing, or threatening to do something, negative, but is only used in a friendly, jovial way.
i am going to boontze you.
im boontzing you're pen.
you're so getting boontzed when we gethome.
The word Yayuk comes from an American native language maning the lowest form of a human being. In the 1900', the french used the word Yayuk to point out a pile of dung. They would pronounced it like "Ya-Yuck", which then was transformed into Yayuk to eventually beome a name.
Eww, yayuk is right there, comming out of the horsesbutt!