just in case
US /dʒʌst ɪn keɪs/
UK /dʒʌst ɪn keɪs/
1.
as a precaution; to be prepared for a possible event or situation
:
•
Take an umbrella, just in case it rains.
•
I brought extra snacks, just in case we get hungry.
as a precaution; to be prepared for a possible event or situation