Similar to the Gaydar and Fagometer, the Queeroscope is a device with a dial that displays on a gradient scale of red to purple in order to tell both how queer someone is or if they are queer at all, red being zero purple being the max.
Person 1: "Hang on my gaydar is malfunctioning and the fagometer is busted. let me check the queeroscope."
Person 2: "whatever dude it'll be in the red."
Person 1:"... shit's purple dog."
Person 2: "... don't tell my parents"