A female character who's entire character is based around a guy's shallow definition of a "perfect girl", a nerd's wet dream girlfriend. She plays all the games he plays, likes everything he likes, and probably has a pixie cut or some other radical hairstyle. She probably has a "perfect body" but hides it under baggy clothes, and wears nothing but nerdy video game centric t shirts or ridiculously over the top outfits that are practically costumes.
Guy: I'm not like other guys who are shallow and just want a blonde bimbo, I want a girl who plays video games and embraces life like me. She's beautiful but doesn't know it, and she loves nerdy stuff!
Girl: So you want a manic pixie dream girl
"Before You Follow" - used on social media, most often to make sure nazis or pedophiles don't follow you, or if you run a nsfw blog, to make sure minors don't follow you
byf please don't follow me if you are under 18