start on
verb1
Informal To criticize.
- Don't start on her about that again!
2
Informal To begin using (something); to set about on a task; to be initiated to begin using.
- We're starting on the long-delayed project soon.
- They haven't started her on solid foods yet.
1 more example
- Start on the vegetables after you've done the bed.
3
Informal To be instigated to talk about, rant or complain regarding a frequent topic.
- Don't start me on that again.