A person which when in conversation has a story to tell whether real or imagined, about a specific idea, person, place, event, or thing, that is more exhilarating, spontaneous, better, worse, shittier, greater, higher, lavish, outstanding, superior, superb, advanced, complex, sophisticated, splendid, wonderful, magnificent, improved, brilliant, admirable, excellent, terrific, marvelous, surprising, amazing, breathtaking, enhanced, thrilling, astonishing, fantastic, shocking, surprising, astounding, exciting, extraordinary, far-fetched, stimulating, electrifying, wonderful, stupendous, invigorating, or glorious then that of the previous. This person may also appear to be more cocky then confident or extremely egotistical. Also see hater, Jew.
Danny McLOvin: Yo, I just bought a new Benz by myself without even working the shits hot.

Scottie McTalks: That shits only a C class; my dad has been working for 30 years, 12 hour days and has a S600, apartment in NYC and a house up in HillBilly land.

Scottie McTalks is a one upper when he refers to his father having something better then McLovin, and when he hates on McLovin out of jealousy because of his success and accomplishments.
by D. Mclovin January 8, 2008
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A one-upper who always has to be bigger or better than you. If your uncle has 20 ft. boat, his uncle or cousin has 21 ft. boat. A one-upper never loses in the world of story-telling.
Chris is a nice guy, but he's a big one-upper. He always follows my stories with a better one!
by MAP08 July 5, 2007
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If you have had a bad day, a one-upper has had the absolute worst day of their entire life and possibly the worst in recorded history. If you met a hot guy on vacation, the one-upper banged Brad Pitt on vacation. If your brother bought you a really cool new CD for your birthday, the one-upper’s brother is God. The one-upper is the most obnoxious and hateable person you have ever met, but they are probably proud that they have one-upped everyone else you ever thought you hated.
I found twenty dollars in the street the other day and I was feeling pretty lucky, until that accursed one-upper told everybody that on that very day he discovered Donald Trump was his uncle. God, I hate that guy.
by Megsi February 22, 2008
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That person who has to be better at everything. Even when they shouldn't want to.
"I remember once as a child I accidentally killed a squirrel."
"Aww that's nothin' bro. I used to kill animals all the time."
"Really?! What the hell is wrong with you freak?
"Oh you think you're disgusted in me? You should see how disgusted I am at me!"

A One Upper
by GroceryClerk November 28, 2015
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A one-upper is someone who always has to be bigger and better than everyone else. If you say you are drunk, they exclaim with how much more they have drank than you.
Although Matt may seem mediocre, he is actually a one-upper; He must always top your story with one of his own.
by Drew Workman December 9, 2007
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A person who hates to be out done. So out of jealousy or hate, whether made up or true has a one upping comment or action to try to make them selves look better.
Example: 1 one upper

Billy shoots wild game and is happy so he posts a pic on face book of his reward from all the hard work.

Billy's friend sees post and is jealous so he post a larger animal he shot illegally years ago.

Example:2

Billy buys acreage to hunt and doesn't let others so he can fill his freezer and not anyone elses because he worked so hard for it with out help.

Billy's friend gets jealous buys land while going in to extreme debt he can't really afford.

Example :3

Billy buys a new car because he never has had one before and has the excess cash to do so.

Billy's friend buys one aswell but bigger , while going in to debt he really can't afford.

Example:4

Billy tells a true life experience about building car engines and racing.

Billy's friend tells a story trying to one up and completely over exaggerates saying he's won racing trophies, but has never had his lieing ass in a race car.
by Tre81 November 5, 2017
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Someone who has apparently had everyone elses experiences happen to them, but much better or much worse. Often this is because they need to be better than others or feel the need to be 'one-up' from everybody else.
Sophie: I got totally drunk and ended up falling asleep on a bench!

Jess: Yeah that happened to me but I woke up in a lion's cage and proper fought it off with my judo style skills. All with a hangover too!

Sophie: You are such a one-upper!
by Gregor McGregorson September 7, 2009
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