psht, pshut,int.|pʃt, pʃʌt| [A natural utterance of whispered sound: cf.pst, whisht.] An utterance enjoining caution or expressing impatience. 1770Foote Lame Lover iii. Wks. 1799 II. 84 Pshut!—Somebody's coming.1868Yates Rock Ahead i. viii, ‘Psht!’ said the old gentleman to himself.