The name given to girls that aren't popular but have boyfriends that are sort of known by everyone.
"Dude, who's that? I haven't seen her like... EVER. Where the hell did she come from?"
"I think that's That One Guy's Girlfriend, you know, the one that looks like Harry Potter? She's been in the same school as you since 3rd grade, man. Seven whole years."
"No fucking way... Huh..."
And they both continue on their way, only to forget about her.
Shy guy's 108 girlfriends are a group of Shy guy's virtual girlfriends. They all are really friendly and don't mind sharing the same guy (lucky dude btw). They all have unique personalities. I won't describe everyone personally, because I don't want to descriminate someone. Lets just say: some of them need to visit church often and drink holy water, some drink too much coffee, some has weak stomach to kimchi, some can bend and nagotiate everything, some likes to eat cakes and are sweet as the cakes.
Shy guy is very lucky to have them. And the girls are lucky to have shy guy.