Auggie AGP stands for Autogynephilia (i can’t tell if it was bait that you didn’t know what it meant or not but)

Pretty much it's when a man gets turned on by the thought of himself being a woman. There's also autoandrophilia (AAP) which is the opposite- when a woman gets turned on by the thought of herself being a man. Most people with these either think they're transgender, used to think they're transgender but detransitioned, or once thought about possibly transitioning. This is why male-to-female transitioners are commonly described with the term AGP, espescially if they claim to be a "trans lesbian".

Remember when Bowblax had victorias secret pulled up because he wanted to get off whilst in panties? And how recently he's identified as being non-binary and think's he's more of a girl because "long hair". This more or less explains it.