This topic interests me as I'm an older bottom who loves getting plowed by a younger guy. Prefer twunks to twinks. The term Daddy is getting used to describe someone in a more dominant role.
I went on Grindr and searched for under 35 and a tribe of Daddy. It's amazing how many much younger guys are referring to themselves as Daddy. One guy was a 22 year old top who's only into 22 and under. "Daddy" as I know it is not involved in that situation, either as the man in the profile or who he's looking for.
It took me a while to finally admit to Daddy status. Don't take it away from me!