Answer: stalest

AnswerCrossword Clue
STALESTMost passe
STALESTLeast newsworthy
STALESTMost uninteresting
STALESTOldest, as jokes
STALESTMost trite
STALESTMost unoriginal
STALESTMost vapid
STALESTMost outdated
STALESTPasse in the extreme
STALESTMost familiar
STALESTLeast salable, perhaps
STALESTMost old-hat
STALESTMost stereotyped
STALESTMost dried-out, as bread
STALESTLeast appetizing, as bread
STALESTHardest, as bread
STALESTLeast fresh, as bread
STALESTFurthest from the freshest
STALESTSuperlatively ancient joke
STALESTMost moldy, maybe
STALESTUnoriginal to the max
STALESTShowing the least originality
stalestnot fresh
stalestSTALE, not fresh
STALESTUnsurpassingly unoriginal
STALESTLike the oldest jokes
STALESTSuperlatively stagnant
STALESTMost overused
STALESTLike the most ancient joke
STALESTLeast fresh
STALESTMost hackneyed
STALESTTrite to the max
STALESTLeast creative
STALESTMost musty
STALESTMost tired
STALESTLeast appetizing
STALESTLeast original
STALESTSuperlatively trite
STALESTMost like a chestnut
STALESTDescribing the state of ancient jokes