check off

verb4

1. •
   (US, Philippines) To mark items on a list (with a checkmark or by crossing them out) that have been chosen for keeping or removal or that have been dealt with (for example, completed or verified as correct or satisfactory).

   • Check off the items on the list that interest you.
   • Check off the correct answer to each question.
2. •
   To carry out a decision recorded through the process of checking off an item on a list, including dealing with it, removing it from the possible choices, or removing the not checked items from further consideration.
3. •
   To deduct union members' dues from their wages.
4. •
   (slang) To request protection by prison authorities.

   • He's not in gen-pop anymore because he checked off.