Origin: In the 1971 Bangladesh Liberation War, and following the defeat of Pakistan, 90000 Pakistani prisoners of war were held for months in Indian internment camps. During their entire ordeal at the hand of Indians (something which should put Guantanamo Bay to shame), the Pakistanis were fed a daily diet of rice and "Bhindi" which means Okra in English. Growing fed up of this meatless existence, some Pakistani prisoners even attempted suicide, albeit unsuccessfully.
Following the release of the 90,000 Pakistani prisoners as a goodwill gesture from India, they went home to narrate stories of how Indians tortured them by feeding them on a daily diet of bhindi. Soon, the term became a pejorative description of Indian men.
"The Bhindi(an)s and their thousand Gods and Goddesses..."