Check‑out is folding after checking due to lack of strength or interest.
Explanation. The term plays off “check” plus “out,” meaning you check and then fold later in the street because you don’t want to invest more. For example, checking the flop with A‑7 on J‑10‑3 then folding to a bet on the turn is checking out. It’s used in cash‑game commentary to describe cautious play meant to preserve stack or pot control without initiating action.