Aha! Look, same initials as me! My go-to dictionary online or in real life is Merriam Webster. Their website is fun to visit for lots of reasons. Recently they posted some of the new official word entries....did you see? They have a section on the site, the Open Dictionary, to submit words you think you should be added.... one was fangirl, but as a verb. I can see that, but shouldn't it also be a noun?
EDIT: oops, forgot to include this......