Gavilán
Gavilán is Spanish for a species of hawk. But when used as a nickname or a pejorative for an older man, it implies that the older man likes to woo women who are much younger than him, not unlike a chicken hawk who swoops in to prey on little chicks.
Ay, that Señor Dioquino. For a man in his fifties, he likes to drive around in his Nissan offering rides to colegialas like a gavilán.