She's just scored a diplomatic coup of the highest order.

It would be excellent experience for them, I thought, a trifling mission in one way, yet in another way, an important diplomatic coup.

Charlie was the last person Sam wanted to know about his little diplomatic coup.

Don't you understand we've won a diplomatic coup?

But for Edward it was a brilliant diplomatic coup.

In one stunning diplomatic coup, the strongest Arab army agreed not to attack the Jewish state.

Even Ribbentrop called up to say he was about to spring a "diplomatic coup" which would save everything.

A most remarkable diplomatic coup, if I might say so, and one facilitated by this mission!

"How the hell does a complete idiot keep coming up with diplomatic coups?"

This time, the invasion is being welcomed as a diplomatic coup.