a bit on the side
成語所屬單字bit
a bit on the side — 慣用語
1. A person who is having a sexual relationship with someone who is already married
1.慣用語
釋義
婚外情對象
A person who is having a sexual relationship with someone who is already married or in a committed relationship.
例句
She found out he had a bit on the side.
Is he your bit on the side?