make a move on someone—
1. move towards a person in a threatening way:
- He fell dead on the floor, clutching a knife in his hand, cut down before he made a move on the man who has challenged his dignity.
2. (coll.) approach a woman in the hope of establishing a romantic relationship (also: put the moves on someone):
- As soon as Ellen left the room, her boyfriend made a move on me.
3. (coll.) act in hostility against a person:
- Fortunately he had three high ranking uncles, thePiccolo brothers, which would deter anyone from making a move on him.
move in on someone—
1. come closer to or surround a person (preparing to attack):
- The police are moving in on the criminals hiding in the house.
2. take up residence with smb., especially so as to inconvenience the person:
- My brother’s friend moved in on us without us even asking him.
3. = make a move on someone 3:
- Some guys from New York moved in on me and purchased my contract. I found out they forced my manager to sell the contract, and didn’t even pay him.