noun
less prominent one of a pair; less famous member (esp. of a comedy duo)
Colloquial noun used to refer to the less famous or less prominent member of a pair, especially in entertainment contexts like comedy duos or idol groups.
あのコンビのじゃない方って、実はすごく面白いんだよね。
The less famous one of that comedy duo is actually really funny, you know.
彼はいつも「じゃない方」扱いされるけど、実力はある。
He's always treated as the 'less prominent one,' but he has real talent.
noun, used as a suffix
the non-... one; the one who is not ...
Colloquial suffix attached to a noun or name to single out the member of a pair who is not that thing, often with a self-deprecating or humorous tone.
私はいつも「美人じゃない方」って言われる。
I'm always called 'the non-beautiful one' (of the pair).
このグループで、歌が上手いじゃない方は私です。
In this group, I'm the one who is not good at singing.