年下の男

年下の男 = toshi shita no otoko = younger man
年下の恋人 = toshi shita no koibito = younger lover

*Picture from Majo no Juoken 魔女の条件

年上の女性 = toshi ue no josei

*I stumbled upon this website and did not get what 年下の男 meant.
I thought it meant a guy who was held back a year in school! :-P