shoot off

Short definition from Wiktionary

Verb

1. 1
   To leave quickly
2. 2
   To do (something, usually a written or verbal communication) quickly, and without hesitation or forethought.
3. 3
   To overshoot the bounds of a set when filming, showing part of what lies outside it.
4. 4
   Used other than figuratively or idiomatically: see shoot, off.