swear off
https://gyazo.com/d3a08982da603758d15ee5234adeebfd
source:
january GIF - Find & Share on GIPHY
swear
off
informal
promise
to
abstain
from:
〈体に悪い習慣〉を誓ってやめる
e.g.
I'd sworn off alcohol.
#phrasal_verb