Answer: yawn

AnswerCrossword Clue
YAWN["Been there, done that"]
YAWNDisplay of disinterest
YAWNRespond to a bore
YAWNOpen wide
YAWN"B-o-r-ing!"
YAWNSign of fatigue
YAWNExpress ennui
YAWNShow boredom
YAWNImpossibility if you keep your mouth shut
YAWNShow boredom, maybe
YAWN"How boring!"
YAWN[B-o-o-ring!]
YAWNLook bored, in a way
YAWNSign of disinterest
YAWNOpening at a long lecture?
YAWNShow sleepiness
YAWNSign of sleepiness
YAWNOpening at an early-morning class?
YAWNBetray boredom
YAWNDemonstrate boredom
yawnthe act of yawning
YAWNAct sleepy
YAWNCatch flies?
YAWNDrowsy response
YAWNDemonstrate tedium
YAWN"Contagious" reflex action
YAWNAction that's supposedly contagious
YAWN[Bo-o-ring!]
YAWNIt may be suppressed at a meeting
YAWNBedtime indicator
YAWNReal bore
YAWNSign of boredom
YAWNLook bored
YAWNBoredom indicator
YAWNBetray sleepiness
YAWNShow fatigue
YAWN[I'm bored]
YAWNResponse to a drone
YAWNBored response
YAWNYou can't keep your mouth shut during it