Rebound

What is the meaning of a "rebound guy hookup"?
-Caeron broke up with her boyfriend to make him her "rebound guy hookup"?

Thanks a millon

A "rebound guy" is someone you hook up with right after you have broken up with someone else.
It means getting into a relationship with another person immediately after ending a previous relationship.

Sometimes people use the expression "on the rebound." "She married him on the rebound."