big-spending sugar daddy
Slang term for a wealthy older man who lavishly spends money on a younger partner, often in a transactional or sugar-dating context.
Apparently she got a luxury bag bought for her by a big-spending sugar daddy.
More young people are looking for sugar daddies on social media.
Compound of 太 (futo, 'fat/thick', here figuratively 'generous') and パパ (papa, 'daddy'). The exact origin is uncertain, but it likely emerged in modern slang related to sugar dating culture.