noun
loose-fitting pants with an elastic or drawcord waist
Wasei-eigo from 'easy pants'; refers to casual, comfortable trousers with a stretchy or adjustable waistband, often worn at home or for relaxed outings.
wasei-eigo (Japanese-coined English), from easy pants
家ではいつもイージーパンツをはいている。
I always wear easy pants at home.
旅行にはイージーパンツが楽でいい。
Easy pants are comfortable and great for traveling.
Variant spelling with a middle dot; less common but still seen.
Sweatpants are typically made of thicker, fleece-like material and often have a sporty look, while イージーパンツ can be made of lighter fabrics and have a more casual, lounge-wear feel.
Relax pants are a broader category of loose, comfortable trousers; イージーパンツ specifically emphasizes the elastic or drawcord waist.
Wasei-eigo from English 'easy' + 'pants'. The term was coined in Japan and is not used in English with the same meaning.