noun, noun or participle which takes 'suru', intransitive verb
cutesy-acting girl; girl who plays innocent and helpless
Derogatory colloquial term for a woman or girl who deliberately acts cute, naive, or helpless to attract attention or favor. Often used with する to describe the behavior.
See also: ぶる
あの子はいつもぶりっ子してて、ちょっとイライラする。
That girl is always acting all cutesy and it's a bit annoying.
ぶりっ子な態度はやめたほうがいいよ。
You should stop that cutesy, helpless act.