¡Que oso! Is a slang used in Mexico, usually by young people, and you can hear it typically from fresas or people who are wealthy, snob, raised in the luxurious, well cared real estates or rich neighborhoods unlike living in the barrio (hood). Its meaning is to be ashamed of something that was done from oneself or others, like making a fool. Its literal meaning is: What bear!

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.