pac-a-mac

plural pac-a-macs

1. UKA lightweight rainjacket that can be compressed into a small pocket-sized bag.

   I am the only customer in the Perch in possession of a backpack and wearing a pac-a-mac, which I've yet to take off despite the sun coming out.

   2017, Tom Chesshyre, From Source to Sea

   2 more examples

   And there she was - wearing a dark blue pac-a-mac over a blue brushed-nylon nightdress, topped off with a hairnet. It was as though Death itself had just walked into the kitchen. She always wore the pac-a-mac because a dressing gown would have taken up valuable space in her suitcase.

   2003, Eric Goulden, A Dysfunctional Success: The Wreckless Eric Manual, page 20

   It was raining hard when the girls came back into the Brownie circle for vespers, and the gaggle of mums gathered in the Drill Hall porch, sweating in their pac-a-macs and listening to the water swishing down the guttering.

   2011, Kate Harrison, Brown Owl's Guide To Life