pigeon pair

plural pigeon pairs

1. A pair of twins, one male and one female.
2. Two siblings, one male and one female.

   “He has two kiddies, a pigeon pair.”

   1961, Xavier Herbert, Soldiers' Women, Netley, SA: Fontana Books, published 1978, page 373

   3 more examples

   Oh, please not twins! Just a pigeon-pair, a son and then a daughter.

   2014, Colleen McCullough, Bittersweet, page 71

   Their first child, a son, was Albert Lewis, born 1893, and he became known to all of us who can remember this wonderful man, as Lew Davey. The second child was a daughter, Cora Annie, born 1895. […] There were two other children (both stillborn) and, to quote Lew, “It is sad to remember that what should have been a family of four, ended up a “pigeon pair”.

   2014, Margaret Dwyer, Jewels Along The Newell, page 62

   “I 'ave a wife and pigeon pair,” he said. “What's a pigeon pair?” I asked him. “Don'cher know a pigeon pair? That's one of each. A pigeon pair, we calls it at 'ome.

   2018, Tom Treanor, One Damn Thing After Another