The girl you know that is cute, cuddly, and obsessed over fantasies in chick flicks like holding your hand or cuddling. Generally her smile creates a kawaii overload in the kawaii receptors of your brain, weakening the toughest man's emotional defenses into that of a newborn puppy.
Frank: So I heard Jamie likes you. Get your kawaii receptors ready man, you won't last five minutes without the right preparations.
Matt: Thanks dude. *brofist*