1. slang Someone who kidnaps a baby. I've seen that woman before—I think she's the baby-snatcher they've been talking about on the news! Call the police!
2. slang Someone in a romantic relationship with a much younger person. Mom, that guy is 17 years younger than you. You'd be a baby-snatcher if you dated him!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.