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TAKE THE QUIZ“on the wall”
The following 4 entries include the term on the wall.
fly-on-the-wall
adjective: having or involving an inconspicuous but effective point of observation
wag-on-the-wall
noun: a wall clock with pendulum and weights exposed
see/read the writing/handwriting on the wall
idiom: to be aware that something bad will probably happen soon
the writing/handwriting is on the wall
idiom—used to say that it is clear that something bad will probably happen soon
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Merriam-Webster unabridged
