Definition (態度)
To think that you are very important, in a way that annoys other people.
自命不凡
I can't stand her—she's so full of herself.
我受不了她——她太自以為是了。
He's a bit too full of himself for my liking.
他有點太自以為是了,我不太喜歡。
I thought he was a bit full of himself and didn't especially take to him.
我覺得他有點自以為是,不太喜歡他。