1.
If you describe someone’s behaviour as ~, you mean that it shocks or embarrasses you because you think that it is rude.
ADJ: usu ADJ n
2.
If you say that someone is ~, you disapprove of the way in which they often say how good, important, or clever they are.
He could become ungraciously ~ about his own capacities.
= boastful
? modest
ADJ: usu v-link ADJ disapproval