gaydar
/ˈɡeɪdɑr/
noun
- The supposed ability to recognize whether someone is gay based on subtle clues in their appearance, behavior, or mannerisms.
- Some people claim to have excellent gaydar, but it's not always accurate.
- She joked that her gaydar was going off when she saw his rainbow keychain.
- He didn't rely on gaydar; he just asked people directly.