lean in

Short definition from Wiktionary

Verb

1. 1
   To shift one's weight forward; to lean forward or towards something.
2. 2
   To proactively take charge of a situation; to be bold in exerting one's will in a situation.
3. 3
   To continue or strengthen a reaction in the face of criticism or disappointment; to redouble efforts despite setbacks and uncertainty from others.