A person--usually a married co-worker--that uses the company Christmas party as an opportunity to get extremely drunk and dance inappropriately on other co-workers' spouses, usually leading to embarrassment the next day.
One who breaks up or ruins a party through a variety of means. Possible ways of dispersing or destroying a party include but are not limited to: calling the authorities, stories involving octogenarian sexual intercourse, Jennifer Aniston movies.
When someone ignores the advise to not point the party popper at another person's face when pulling the string, causing the person to have severe facial disfiguration.
Tim: yeah man! HAPPY NEW YEAR!! *pulls party popper string*
Tom: OH SWEET JESUS, MY FACE!
Tim: OH FUCK, YOUR EYE IS COMPLETELY SEVERED...
Tom: DUDE, YOU PARTYPOPPERPWNED ME.