DONTLAUGH

Set to 2 different clues across 2 published puzzles, most often "No, really" — The New York Times, Saturday, 8 November 2008.

9 letters

Every clue on record, most used first

"No, really"once
The New York Times — Saturday, 8 November 2008
Caution before making a wild assertiononce
The New York Times — Thursday, 11 July 2002