A good employer would listen to your complaint. Then talk to the other guy. But he will not get fired over one incident.
It may get added to his personal file. If the list of complaints gets to big, some training may follow.
In my country it is very difficult to fire somebody for something like this. Only after repeated incidents, extra training and multiple chances to improve over a longer period of time would they stand a chance.
That does however require other people to report those incidents. So go ahead and report it because it clearly makes you very uncomfortable and it is very unprofessional from the other guy.