make a move

Short definition from Wiktionary

Verb

1. 1
   To take action.
2. 2
   To depart from a place; to set off.
3. 3
   To initiate a conversation or perform an action intended to engage the willing attention of a person in whom one has a romantic or sexual interest; to approach someone of romantic or sexual appeal in hopes of escalating to a romantic or sexual encounter or relationship.
4. 4
   Used other than figuratively or idiomatically: see make, move.