The act of invading something with chillness. Originating from a ski trip called invasion; because the trip was so chill the trip and chill became one extremely chill word.
That party last night was CHILLVASION.
by Rich & Holland January 15, 2006
a bomb snowboarding trip in which you travel out of state
Chillvasion is fucking awsome dude.
by Dan December 24, 2004