He is acting grumpy, as if he forgot to take his medication this morning.
forget to take one's medication this morning
idiomTo be annoyed or irritable, or to behave in an ill-mannered way, particularly in the morning.
Please do not mind his rude comments; he likely forgot to take his medication this morning.
Her uncharacteristic outburst during the meeting left colleagues wondering if she had simply forgotten to take her medication this morning.
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abound in one's own sense
To follow one’s own inclinations and opinions.
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ace up one's sleeve
A surprise advantage of which others are not aware.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
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afraid of one's own shadow
Exceptionally timid.
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air one's dirty laundry in public
To reveal one's sordid secrets to the public.
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air one's dirty linen in public
Synonym of air one's dirty laundry in public.
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albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.