'Significant other', meaning 'partner', now that's an interesting turn of phrase.
2.
the ability to express yourself well.
She has a nice turn of phrase which should serve her well in journalism.
turn of phrase
1. An expression. I understood what she was saying until she used a turn of phrase that I had never heard.
2. An eloquent style of writing or speaking. That writer's turn of phrase has earned him many accolades and awards.
turn of phrase
A particular arrangement of words, as in I'd never heard that turn of phrase before, or An idiom can be described as a turn of phrase. This idiom alludes to the turning or shaping of objects (as on a lathe), a usage dating from the late 1600s.
a ˌturn of ˈphrase
a particular way of saying something or describing something: She has a very amusing turn of phrase.