1.
jeans, denim pants
Casual pants made of denim fabric, originally designed for work but now worn as everyday casual wear.
ジーパン is a Japanese-coined word for jeans, combining "G" (from "jeans") + パン(ツ) (pants).
Alternative terms
ジーパン is the most traditional Japanese term and is still widely understood, though younger speakers may prefer ジーンズ or デニム.
Types
Usage
ジーパン was especially popular in the 1970s-80s. The term has a slightly older or more casual feel compared to ジーンズ/デニム.