Weaboo is to Japan as Koreaboo is to Korea. Mostly fans of Korean media culture, Kpop, Kdrama, Ulzzangs. Also Gangnam style will be the birth of a lot of these 'koreaboos'.
Emer just keeps taking selca so she'll become an Ulzzang and Oppa will love her, in reality she's just a Koreaboo.