Excelling at sports is seen as unimpressive, and school plays are completely laughable.

The Catholic Church's record in regard to Fascists might charitably be regarded as unimpressive.

Fao is about as unimpressive a place as I've seen.

Hence they are neglected by the public as unimpressive, futile wasters of breath or ink.

It's as unimpressive as running a five-minute mile.

Some colleagues were irritated by the bar mitzvah boy displays; some regarded his breadth of learning as unimpressive.

"Hello," he said, in a voice that was as unimpressive as his appearance.

As far as the more visible commerce of the more sight-seen parts of the Thames is concerned, it is as unimpressive as may be.