chalk off

verb8

1. •
   To set off an area or shape with chalk.
2. •
   To disallow or cancel

   • In one last extraordinary twist, City thought they had snatched victory and Sterling a hat-trick, but emotions switched instantly as once again VAR had the final word and the goal was chalked off. — 2019
3. •
   To chalk (someone) up dismissively or jeeringly.

   • We had chalked him off as an idiot!
4. •
   To dismiss or be dismissive towards (someone or something); to reject (someone or something).

   • He seemed like an idiot, so I chalked him off.
5. •
   To mark off (something).
6. •
   To record a score or event, as if on a chalkboard.
7. •
   To deduct from something; to separate from something.

   • The funds are going to be chalked off from the events fund.
8. •
   (slang) To kill (someone).