One-upper 

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!

One-upper by MAP08 August 2, 2007

one-upper 

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.

one-upper by Megsi February 23, 2008

one-upper 

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.

one-upper by Drew Workman January 3, 2008

One-upper 

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!

One-upper by Gregor McGregorson September 7, 2009

One-upper 

Someone who always has to beat someone else's story by 'one-upping' them. Such people are usually making these stories up, but seek to lie to try and seem more impressive to the audience of the first person's story.

George to friends: I hit three 3 pointers in a row at basketball
Lee to friends: I hit seven 3 pointers in a row at basketball
Friends: You are such a one-upper, Lee

One-upper by pandaman24 June 12, 2013

One-upper 

The phrase used to describe the consumption of drugs (particularly MDMA) orally usually in the parachute form done by placing the substance in a small piece of toilet paper or similar material and consuming with a drink usually alcoholic or juice.

I’m probably going to do a one-upper with this M, it lasts way longer.

One-upper by Wolfraider May 17, 2020

one upper 

An annoying person who responds to hearing someone else’s experience or problem by immediately telling a similar story about themselves with a much more fantastic (or terrible) outcome.

Person: I got to meet James Hetfield before the concert and I got his autograph.
One Upper: Yeah, well my cousin knows the head of security for Metallica, and he got us front row tickets to the show and then we went backstage and met the whole group. Then they invited us back to their hotel room and we partied with them all night.

Person: I have a a dislocated knee.
One Upper: Yeah, well last summer I broke my leg in four places and had to have a steel pin inserted. I also had to have surgery done on my knee to repair the torn ligaments. I was on crutches for almost two months.

one upper by Dawn Davenport December 1, 2004