the odd one out
US /ðɪ ˌɑːd wʌn ˈaʊt/
UK /ðɪ ˌɑːd wʌn ˈaʊt/

1.
farklı olan, istisna, aykırı
a person or thing that is different from or excluded from others in a group or series
:
•
In this group of fruits, the apple is the odd one out because all the others are berries.
Bu meyve grubunda elma farklı olan çünkü diğerleri hep böğürtlen.
•
He always felt like the odd one out in his family because he was the only artist.
Ailesinde her zaman farklı olan gibi hissetti çünkü tek sanatçı oydu.