n. & adj. — predominantly Ontario
a dance or party for an engaged couple to raise funds for their wedding.
Type: 1. Origin — In Canada, the terms bachelor party and bachelorette party are used for an event that celebrates, often exuberantly, the end of the bachelor/bachelorette lifestyle with one's closest friends. Buck and doe parties by contrast, are a joint event of bride and groom with the purpose of raising funds, with the extended family partaking. A common variant of buck and doe is stag and doe (also a Canadianism). As Chart 2 convincingly shows, buck and doe is a chiefly Ontarian variant of stag and doe.
See also COD-2, which first identified the term as an Ontarianism (marked as "Cdn (Ont)").
See also: stag and doe
- The expression is often used in compounds, as in buck and doe party.
Images:

Chart 1: Internet Domain Search, 13 November 2013
Chart 2: Regional Domain Search, 15 Jan. 2016