Best definition
The act of outwardly supporting a organisation of cause; esp. supporting the Indian cricket team. Zindabadding can include performing Bhangra

Dances, sounding team-supporting paraphernalia (such as whistles and horns), waving flags, and chanting “INDIA, ZINDABAD.”

“Hey, India is playing today, let us go to the pub and engage in some zindabadding!”