Idiom: just in case
— I always have an extra clean shirt and tie at work, just in case a client stops in unexpectedly.
— You should never gossip via email at work—just in case the management team monitors your email.
— I brought my umbrella just in case it rains this afternoon.
— Here's my cell phone number just in case you need to reach me after hours.
— I packed an extra sandwich just in case you want a snack before your afternoon football practice.
— Just in case you arrive before I do, you can get the extra key to my apartment from the concierge on the first floor.
— I believe the restaurant takes credit cards but you should bring some cash just in case they don't.
— Our house is a bit difficult to find, so my wife printed out directions to our home just in case you need them.
— We bought refundable airline tickets just in case my husband can't get time off from work.
— Just in case I’m late this evening, please take the dog out for a walk.
— You better take some cash with you just in case they don’t accept credit cards.
— Take your phone just in case you're running late so you can call me.
— Bring your ID just in case you need it.
— Shall we bring a blanket just in case the ground is wet at the concert?
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