He digs his heels in whenever I suggest a new plan.
dig one's heels in
idiomto refuse to change one's plans or ideas, especially when counseled otherwise
Even though the team presented better options, the manager dug his heels in and refused to change the project deadline.
Despite the mounting evidence that his strategy was failing, the CEO dug his heels in, stubbornly rejecting any advice from his board of directors.
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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”).
- 05
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.