The day a girl literally comes to you after developing a crush and asks you if you’d like to be her date. Heck, there’s even Valentine’s coitus!
Also the day Charlie Brown gets bashed by reason of socialism because his other friends Roger Rabbit and Bugs Bunny had been ditched for other people, and because that live-action Cat in the Hat keeps looking at the explicit drape on the image of Nick’s mother.

1. noun. It is the sudden feeling of an inexplicable joy one gets when something romantic or idealistic occurs.

When kilig, one may experience the following:

*butterflies in one's stomach
*heart melting
*shivers down one's spine
*irrepressible noises from one's mouth
*uncontrollable smiling
*an inner conflict between hope of something wished for and reality

Kilig may also be defined as that mountain top, floating, on cloud nine, invincible, i-could-keep-smiling, heart aching goodness and feeling which overpowers the mind's ability to think straight, act straight, breathe properly and articulate thoughts into a single comprehensible sentence.