Gaydar is if you can sense someone is gay. Like if they act feminine, or act kinda flirty around guys(for a dude) you get that vibe that they might be gay.
Dwight: [reading the note with the gay-dar] "Hope this helps. -Jim" Nice!
Oscar: [Dwight is running the gay-dar over Oscar's body] What are you doing?!
Dwight: Shhh. Don't be scared. [gay-dar beeps over Oscar's belt buckle, Dwight smiles] It works. [gay-dar goes off next to Dwight's belt buckle] ...oh no.
Oscar: [Dwight is running the gay-dar over Oscar's body] What are you doing?!
Dwight: Shhh. Don't be scared. [gay-dar beeps over Oscar's belt buckle, Dwight smiles] It works. [gay-dar goes off next to Dwight's belt buckle] ...oh no.