To stick ones finger in another person's anus.
"Last night the missus wanted anal, so I loosened her up by giving her a sunil".
"Your missus got suniled".
"You got suniled".
The undisputed goat of Indian football. He is currently playing for Bengaluru FC in the Indian Super League. He has more than 90 goals for India (93 at the time of writing) and has a FIFA documentary made about him. No one will come close to his level of greatness.
Person 1: Do you know who scored for India yesterday?
Person 2: Obviously the goat Sunil Chhetri