get (one's) hands on (someone)
To touch or grasp someone, often with the threat of violence. Oh, once I get my hands on you, you'll take back what you said!
lay (one's) hands on (someone or something)
1. To touch or grasp someone, often with the threat of violence. Oh, once I lay my hands on you, you'll take back what you said!
2. To acquire something, usually a physical object. I need to go to the library and lay my hands on this book for my research paper. It took years, but I've finally laid my hands on this very rare Beatles recording!