heads-up

Definitions

1. A warning or call to pay attention; an advisory notice; a notice of what is to happen; a holler.
   US, idiomatic
2. Involving two players. (usually said when there are only two players in the table; or, when all players except two folded)

Equivalents

Examples

“Send⟳ everyone a heads-up about the inspection tomorrow.”

“There were only two of us, so we started playing heads-up.”

“There are seven players on the table. Five folded, the remaining two played heads-up until the showdown.”

CEFR level