Wiktionary
wisehead
n. (context obsolete sarcastic English) A person who is wise or who considers himself or herself to be wise.
Usage examples of "wisehead".
Fleda found a beauty in the candour and even in the modesty which apparently kept him from suspecting that two such wiseheads could possibly be occupied with Owen Gereth.
WENT, at last, the wiseheads, down to Poynton, where poor palpitating Fleda had the full revelation.
The scientific wiseheads said it was all quite simple, the dog was a biological sport.