turn sth on its head
to cause something to be the opposite of what it was before:
These new findings turn the accepted theories on their head.
Thesaurus: synonyms and related words
Changing
- a new broom sweeps clean idiom
- about-turn
- alter
- alternate
- alternation
- bastardize
- convert
- move on
- move the goalposts idiom
- move with the times idiom
- new
- new broom
- onto
- reverse
- swing
- transfigure
- transform
- transitional
- transmogrify
- transmute
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