cradle robber
noun
University
1
A person who marries or becomes romantically involved with someone who is much younger, or who employs or otherwise engages a young person for a purpose inappropriate for his or her age.
Thesaurus
Synonyms
#derogatory
A person who marries or becomes romantically involved with someone who is much younger, or who employs or otherwise engages a young person for a purpose inappropriate for his or her age.