quick on the trigger

Would you tell me whether I am right with my interpretation of the expressions in bold in the following sentence?

Summy’s going to divorce Natalie – he ran into her with Tom…and you know how quick on the trigger he is.

quick on the trigger = quick-tempered, peppery, impulsive,

Thank you for your efforts.

The expression “to be quick on the trigger” means to react quickly, impulsively. So, your interpretation is correct :slight_smile: