Bonding-Rumble is a general term to refer to Rumbles that occur during Bonding-Ceremonies that have not been determined to be, specifically, Greeting-Rumbles, Estrous-Rumbles, or Female-Chorus-Rumbles. In other words they include the powerful overlapping Rumbles that occur during a Mating-Pandemonium, the birth of a calf, or during the formation of a Coalition or during High-Fiving or an End-Zone-Dance. 

References: Poole 2011. (Full reference list)

This behavior occurs in the following context(s): Advertisement & Attraction, Affiliative, Coalition Building, Courtship