Acronym for "fuck shit up".
The act of fucking shit up. Applies to partying really hard, trashing the environment around you, or just being hardcore.

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.

they call themselves Friends Stand United, but 'fuck shit up' is also an apt moniker. they started as a group of boston hardcore fans who have announced to the world that they "rid the boston scene of nazis", and proceeded to become terrors and bullies themselves,
eventually destroying the boston scene because people wouldn't go to shows or have parties, they were so frightened of FSU's violence. there was a period of years where nobody had parties for fear they would show up.
not only does fsu 'not take shit' from people, they also enjoy beating kids up at bars and parties for no apparent reason. violent, nasty, and disrespectful, they've been banned from a number of bars and clubs but are back ruining parties yet again. they are widely disliked and feared in boston, and if they show up at a party you're having, you best shut it down so they leave.

Fuck shit up.

FSU or Friends Stand United are a bunch of fags who gang up on people at concerts/start fights, they never fight man to man, they always, as the name implies, fight in numbers, usually against a single opponent. They seem to think that its cool to just stomp people who disagree with/disrespect them, as opposed to being a man and fighting 1v1. Also they often use weapons and cheap tactics against unarmed and often innocent concert-goers

Fuck shit up.

Stealing traffic/construction cones, chasing small child men, yelling "don't fuck with my friends" at innocent passersby, sleeping in garages just because, skinny dipping with sexy Scottish men, having wrestling matches on the floor at 3 a.m. to prevent the bar from closing, taking a shot of tequila whiskey baileys and malibu just for fun, streaking in front of small children, and most important snuggling.