just in case
US /dʒʌst ɪn keɪs/
UK /dʒʌst ɪn keɪs/

1.
kalau-kalau, untuk berjaga-jaga
as a precaution; to be prepared for a possible event or situation
:
•
Take an umbrella, just in case it rains.
Bawa payung, kalau-kalau hujan.
•
I brought extra snacks, just in case we get hungry.
Aku membawa camilan tambahan, kalau-kalau kita lapar.