dash off
verb1
To leave a place quickly or briefly.
- I have to dash off to the store, but I'll be back soon.
2
Idiomatic To write quickly or informally.
- Let me dash off a quick note.
- In the '50s, she worked as an usherette at the famed Apollo Theater, joined a jazzy trio called the Halos, recorded as the "Dee" half of a short-lived Shirley & Lee-ish Jay & Dee, and dashed off tunes in her spare time.1990, Wayne Jancik, The Billboard Book of One-Hit Wonders, →ISBN, page 139: