I’m looking for a word that denotes a child (either a young one or a fully grown one) who acts disrespectfully and spitefully toward their parents.
For instance, if you see your friend being disrespectful toward his or her parent, you might ask your friend,
Why are you acting like a ________ ?
An adverbial form would be sufficient too, like
“Why are you acting [adverbial form of word]?”
I do not want any words that have connotations of annoying, whiny, irritating, etc. This includes “brat,” “rascal,” etc.
The word can be archaic (that is, old-fashioned) but preferably not obsolete (i.e. no longer used at all).