check somebody off

Từ điển Oxford Advanced Learner 8th

ˌcheck sb/sthˈoff derived
(NAmE) (BrE ˌtick sb/sth ˈoff)to put a mark (✓) beside a name or an item on a list to show that sth has been dealt with
• Check the names off as the guests arrive.
•As I packed my case I checked everything off on my list.
Main entry: ↑check_derived