No comment
"No comment" in a Sentence (2 examples)
The district attorney said, "No comment," when the reporter asked if he knew the identity of the murder suspect, for fear that the culprit might be a flight risk.
Wrex: And Shepard--I like what you've done with the Normandy. Got tired of always hanging around the cargo bay before. Wrex: I still don't have a window like Liara does... but maybe that's because I don't kiss as well. [laughter] Shepard: No comment. Wrex: Yeah [laughter]... I missed this place.