a sugar daddy
A man who gives his much younger romantic or sexual partner a lot of money and gifts. Often implies that the financial aspect is in lieu of genuine romantic interest from one or both people in the relationship. I know I shouldn't judge just from appearances, but it certainly seems like Tammy's new boyfriend is a bit of a sugar daddy. Todd is not my sugar daddy! Sure, he treats me to dinner and takes me on vacations now and then, but I pay my own way in life!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
a ˈsugar daddy(informal) an older man who has a much younger woman as a girlfriend and gives her presents, money, etc: When you tell him that he’s a sugar daddy, he gets very angry. He says she isn’t interested in his money, only in him.
Farlex Partner Idioms Dictionary © Farlex 2017