Compound ofF(エフ)(efu,first letter of Englishfirst) +J(ジェー)K(ケー)(jēkē,“female high school student”). It was widely used withM(エム)J(ジェー)K(ケー)(emujēkē) andL(エル)J(ジェー)K(ケー)(erujēkē) after broadcasting ofBay Storm byKazunari Ninomiya.
FJK(エフジェーケー)• (efujēkē)