checkback
noun/ˈt͡ʃɛkbæk/
Etymology From check + back.
1
Bridge, Games A play of a designated card as a prompt to one's partner to respond with a play indicating the kinds of card he/she holds.
- True, you need some form of checkback, which is an artificial two-club or two-diamond rebid by the responder to ask for more information.2007 May 10, Phillip Alder, “From a Nevada Tournament, Defense by the Textbook”, in New York Times: