1. Extreme nervousness
   "He got the jim-jams before his public speech";
   - jitters, heebie-jeebies [informal], screaming meemies [N. Amer, informal], screaming abdabs [Brit, informal]
    
2. [Brit, informal] (usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers
   "He changed into his comfortable jim-jams before settling in for a movie night";
   - pajama, pyjama, pj's [informal], jammies [N. Amer, informal]

Type of: nerves, nervousness, nightclothes, nightwear, sleepwear