one upper

A one upper is one who feels like they need to be better than everyone else, so they constantly "one-up" anything that anyone says.

Chad: Dude, I got a V-6 Mustang today, its Lime Green!
Todd: Oh, but I just got a Roush 'Stang with a supercharger thats laying down 400 to the wheels dawg.
Chad: -_- (gee what a one upper)

by Marcelo D. April 10, 2006

upper decker

the act of sneaking into a bathroom, quietly lifting the lid off of the toilet tank, taking a deuce in the tank and then replacing the lid. this causes the toilet water in the bowl to be polluted after each flush. this is usually done at a party or too someone that you despise.

heath snuck into the frat house bathroom and left an upper decker in the tank, much to the dismay of the alpha betas.

by kirk May 31, 2005

Upper Decker

A toilet prank, whereby someone defecates in the refill tank (water closet), causing each additional flush to deliver brown, poopy water into the bowl.

Jim was being such a jerk at his party, so I went upstairs to his bathroom and dropped an upper decker in his toilet.

by bodythunder December 9, 2008

one upper

someone who needs to make themself feel better by making themself seem greater than everyone else

someone who thinks they know everything, everyone, and has done everything you do, but better

-ADRIAN CLEEK OF DALLAS TEXAS

-Guy 1 "I built a robotic roach the other day, look,"
-Adrian "So what, my class won a battle bots tourny because of my ideas on how to build it."

-Guy 1 "What is heat lightning again?"
-Adrian "Heat lightning is made when ice particles in the clouds rub together, then the friction it makes creates a lightning bolt"
-Teacher "It's a normal lightning bolt, but instead its red, and makes no sound...Adrian, dont try to be a one upper."

by qwertyismyname January 6, 2008

Upper Decker

When attending a persons home of who you dislike, take a shit in the toliet tank instead of the bowl. This is by far going out of the park and into the upperdeck where it will not be known until long after you depart their house.

When your wife makes you go to her boss's party who you would like to kill, go to the bathroom and leave him an Upper Decker and you'll know who the joke is really on.

by Noah Burnett May 9, 2006

upper decker

To take a crap in the tank of someone's toilet and not flush afterwards. When the next person flushes your crap comes rushing into the bowl all broken apart. A lot will clog in the top. This is mean.

It was my last day of work, and a friday to boot...so I left an upper-decker in the men's room.

by Anonymous April 10, 2003

Upper Desker

When your co-worker is feeling down and you shit on his/her desk to cheer them up.

1. Juan was overcome with sadness, so I offered to give him an upper desker.

2. After giving Cheryl an upper desker, she needed gasoline, a flamethrower, and a therapist to remove the memories.

by Hitokiri_Dan July 20, 2011