cocktail party graph

So called because it can be visualised as the set of handshakes if n couples go to a party and each person shakes hands with every person except his or her partner.

cocktail party graph (plural cocktail party graphs)

1. (mathematics) A graph consisting of two rows of paired nodes in which all nodes except the paired ones are connected with straight lines; it is the complement of the ladder rung graph, and the dual graph of the hypercube.

• hyperoctahedral graph

• Turán graph