Definition - What does Gaydar mean?
Gaydar is a slang term that refers to the ability to sense whether or not an individual is homosexual. The term originates from the combination of the words gay and radar.
Kinkly explains Gaydar
Gaydar is considered somewhat of a skill that allows one to recognize whether or not another individual is gay or homosexual. As the name implies, it is a type of gay radar. Those who have good gaydar feel they can easily distinguish homosexuals from heterosexuals purely based upon physical traits and mannerisms.