bracket quinella; bracket win
Abbreviation of 枠番連勝. A horse-racing bet type where you pick the two brackets (枠) that will finish first and second, in any order.
See also: 枠番連勝
I bet on a bracket quinella in today's race.
Abbreviation of 枠番連勝 (わくばんれんしょう), literally 'bracket number consecutive win'.