plural nounBritish informal
- He arrived at last week's ‘black tie’ Ernst & Young Entrepreneur of the Year awards in what looked like his jim-jams and a dressing gown.
- They wear cute vest and drawstring jim-jams, do face packs, drink wine from Habitat goblets and wait for boy-band pretty pizza boys to deliver junk food.
- Half of all those quizzed in the Midlands said they liked to slip into their jim-jams to log on.
early 20th century: abbreviation of pie-jim-jams, alteration of pyjamas.