get above yourself
US /ɡet əˈbʌv jʊərˈself/
UK /ɡet əˈbʌv jʊərˈself/

1.
merasa lebih tinggi, sombong
to think that you are better or more important than you really are
:
•
After his promotion, he started to get above himself, treating his old colleagues poorly.
Setelah promosinya, dia mulai merasa lebih tinggi, memperlakukan rekan-rekan lamanya dengan buruk.
•
Don't get above yourself just because you won one game.
Jangan merasa lebih tinggi hanya karena kamu memenangkan satu pertandingan.