do a 180
See180
What, now we're supposed to make a 180 just because the government has changed their mind about whether eggs are good for us?
He didn't support gay marriage until his daughter got engaged to her girlfriend, and then he made a 180.
Her constituents are tired of her making 180s on policy decisions every time a new lobbyist arrives in her office.
SMART Vocabulary: related words and phrases
Changing your mind
180
about-face
about-turn
back away
back out
cave in
cold
go back on something
have another think comingidiom
make an about-face
make an about-turn
move
oscillate
pull out
shift
shift (your) groundidiom
there's no turning backidiom
think againidiom
think better of somethingidiom
time-server