be insolent

See: disparage
References in classic literature ?
The ignorant English mind (I have observed) is apt to be insolent in the exercise of unrestrained English liberty.
Sudden Pow'r is apt to be insolent, Sudden Liberty saucy; that behaves best which has grown gradually.
Ferstler deserves a good slap," refers to "that lady shrink (name escapes me)," and ends with a sentence stating "Tell Howie to flick the switch occasionally," I find it hard to treat what appears to be insolent sarcasm as serious discourse.