Anime term: Young or underage girl.
Usually conveyed as innocent/curious and put in a tempting, not-so-innocent situation. See jailbait.
Girl: I just stayed at some guys house. He's 23.
Friend: But you're a lolikon...
Girl: I know. Hehe.
Male Over the Age of 18: That girl is way too hot to be a lolikon. o_o;