Pajamas or pyjamas, often shortened to PJs, jimmies, jimjams, jimmyjams or jammies, can refer to several related types of clothing originating from the Indian subcontinent. Pajamas are loose-fitting garments derived from the original garment and worn chiefly for sleeping, but sometimes also for lounging, also by both sexes. More generally, pajamas may refer to several garments, for both daywear and nightwear, derived from traditional pajamas and involving variations of style and material.
The word pyjama was borrowed c. 1800 from the Hindustani pāy-jāma (پاجامہ, पाजामा), itself borrowed from Persian pāy-jāmeh پايجامه lit. 'leg-garment'.The original pyjāmā are loose, lightweight trousers fitted with drawstring waistbands worn by Muslims in India and adopted by Europeans during East India Company rule in India