start in phrasal verb American English (
see also start)
1. to begin doing something, especially with a lot of effort:
I decided to just start in and see what I could do.start in on
Lilly started in on her burger.2. to begin criticizing someone or complaining to them about something
start in on
Mom turned away from Rose and started in on me. [TahlilGaran] Dictionary of Contemporary English ▲