Okay, yeah.
Reverse homophobia is not a thing.
First of all, the term you're looking for is Heterophobia. Which, by the way, is not real either. Why? Because you will never see a person get beat up and possibly murdered for being Straight. You will never see a person denied vital services for being Straight. You will never see Straight people fighting for Straigh rights. You will never see a person denied a job or an opportunity for being Straight.You will never see something like the Westboro Baptist Church for Straight people.
Never.
That would be more discrimination than homophobia. You can argue it is a result of homophobia but it is not homophobia itself.
Phobia is an irrational fear. So if someone has an irrational fear of straight people they are a heterophobe by its very definition.
EDIT:
Also wasn't trevor from GTA bi?