Similar to the Wingman, Wingbhaiya is a term for a man who supports his male friend (the pilot) when approaching women. He helps the pilot approach pairs and groups of women without the awkwardness of being alone. He will sometimes take the less attractive woman of a pair so that the pilot can get the more attractive without interruption.
Yaar, I'm going out with my wingbhai tonight. We're gonna get after than chuddi.