The story
After Jawaharlal Nehru, first Prime Minister of India, who wore such a jacket.
Etymology from Wiktionary, CC BY-SA 4.0.
Nehru jacket
Today it means: A hip-length tailored unisex coat with a mandarin collar, modelled on the South Asian achkan or sherwani and briefly popular in the West in the 1960s and 1970s. Full definition →