Sevens Syndrome 

Very common amongst international kids in Hong Kong, Sevens Syndrome happens during the last weekend of March where the Hong Kong Rugby Sevens take place. With all the rugby and partying atmosphere happening, people with Sevens Syndrome is so focused on having fun in the sevens they would do it at anybody's expense, often pissing people off before it even starts. Also easily angered by anything sevens related.

"Hey why's John getting all angry over Jason not letting him lend his id for the south stand?"
"Sevens syndrome"
"Right"

Sevens Syndrome by SevensBoy March 26, 2010

Seven Dwarf Syndrome  

A condition where a person takes on one of the emotions and personalty of one of the seven dwarfs possibly multiple times a day and or week.

"Seven Dwarf Syndrome "
It's gotta be tough having Seven Dwarf Syndrome, you never know which one of the Seven dwarfs she is going to be today, oh it looks like we got Grumpy.

Seven Dwarf Syndrome by David Kahn January 26, 2009

Seven Second Syndrome 

Seven Second Syndrome is when you change radio stations and they are playing the last seven seconds of an awesome song that you haven't heard in years, immediately followed by an awful song that you despise.

When I flipped to the 80's station, I caught the last seven seconds of a Replacements song I haven't heard since college, then they launched into an extended remix of the sublimely-awful "The Final Countdown" by Europe. Damn Seven Second Syndrome again!

Seven Second Syndrome by mooltittle April 30, 2014

Seven Evil Exes Syndrome 

A condition a person acquires when he/she has had several terrible past relationships that have left them with severe emotional baggage. Because of this, any person that enters into a relationship with a person afflicted with SEES in the future must work through, or "fight", each issue caused by each ex before the two of them can be in a healthy partnership.

There do not necessarily have to be seven exes for SEES to apply. This condition could appear with as few as one ex, if the ex was especially terrible.

Based on the circumstances in "Scott Pilgrim vs. The World"

My boyfriend's been cheated on so many times that he has a hard time trusting anyone. I think those bitches he was with before gave him Seven Evil Exes Syndrome...

Seven Evil Exes Syndrome by LedChelsea September 10, 2011