characteristic of those having an inflated idea of their own importance
characteristic of false pride; having an exaggerated sense of self-importance
"a conceited fool"
"an attitude of self-conceited arrogance"
"an egotistical disregard of others"
"so swollen by victory that he was unfit for normal duty"
"growing ever more swollen-headed and arbitrary"
"vain about her clothes"
Egotistical.