I was browsing the Urban Dictionary today and came across some entries that I enjoyed:
Homobrophobia: The fear that your brother will be or is gay.
Sargasm: Deriving far too much satisfaction from glibly berating another with sarcasm.
Deja moo: The feeling that you have heard this bullshit before.
Mass merchanditis: The hazy feeling one gets after spending too much time shopping at large chain stores including but not limited to Walmart, Home Depot, and Bed, Bath and Beyond. Characterized by a headache, dry eyes, blurred vision, blank stare, sore feet.
Stoptional: When the braking of a car is left to one's choice due to an unnecessary stop sign.
The Spousal We: The opposite of the royal we, meaning "you". Used by your significant other to get you to do something.