Used to describe a person, particularly a man, who is socially construed as straight by those around him/her, but in actuality is gay. Someone who goes undected on the gaydar
spectrum. Thick, deceptive skin on outside, but a fruit
on the inside. Based on the avocado being widely misnomered as a vegetable, when it is indeed a fruit.
Amber: I had no idea that Jerry was gay! He seems so...so... hetero!
Omar: Yeah. Everyone thinks that. He's an avocado.