I believe you are wrong - it is increasingly ironic every time it is repeated. And doubly so given that 'to coin a phrase' is also a cliche. Whether that was their intention, or whether you are annoyed by it, is a different matter.
We're violently agreeing here. They're intending one irony and falling flat. That's an irony, but they get no credit from me. It wasn't their idea. And they're cunts.
I believe you are wrong - it is increasingly ironic every time it is repeated. And doubly so given that 'to coin a phrase' is also a cliche. Whether that was their intention, or whether you are annoyed by it, is a different matter.