えらそう
erasō

na-Adjective

1. self-important; important-looking; pompous; proud; conceited; snobbish

はつ対面たいめんとき、彼かれえらそうな態度たいどっているとおもった。
shotaimenno tokika rewa erasōna taidō totte iruto omotta
When I first met him, I thought he was putting on airs.
Other forms: