Nickname used for men who have small penises and erectile dysfunction. They often date "women" when in reality they are chicks with massive fucking cocks.
A potentially derogatory term for an individual who is acting suspiciously like Gustavo Fring, when they are not, in fact, Gustavo Fring (from the hit-TV series Breaking Bad and Better Call Saul).
Henry: In tense social situations, I maintain a calm demeanor and put on a facade of confidence!
Scott: Ah, so you act gussy.
It is a secondary internet slang term used to describe a woman's hole or holes, not necessarily specific. Think about the term "bussy" but it is the opposite of it which is relating to a woman, not a man.