A fit of depression or nervousness:pre-race jim-jams
Origin
Mid 16th century (originally denoting a small article or knick-knack): fanciful reduplication. The current sense dates from the late 19th century.
jim-jams2
/ˈdʒɪmdʒamz /
plural nounBritishinformal
Pyjamas.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.
Origin
Early 20th century: abbreviation of pie-jim-jams, alteration of pyjamas.