i Register
In some senses, lady-killer is marked as colloquial. Watch for register when choosing this word.
noun
A man unusually attractive to women.
Davey, smart in clean shirt, riding-breeches and leggings, was in his element, his quick eyes everywhere, fancying himself too as a lady-killer.
Spotlight on me, I still look twenty / Still get money, lady killer pushing a Bentley
An uncaring womanizer.