An excessively high opinion of oneself or one’s abilities; presumption, arrogance.
present participle of overween
unrestrained, especially with regard to feelings
"extravagant praise"
"exuberant compliments"
"overweening ambition"
"overweening greed"
presumptuously arrogant
"had a witty but overweening manner"
"no idea how overweening he would be"
"getting a little uppity and needed to be slapped down"
Unduly confident; arrogant