to separate from your children on the first ski run of the day and leave supervision of them to your ski buddies.
Etymology: Ski culture - Inland NW, USA. A subset of the term "Indian outsourcing".
Willy pulled a Bombay Sunrise and we didn't see him again until lunch.
When you fuck an Indian girl on her period.
Damn bruh, I Bombay Sunrise'd Sara so hard last night.