Upper Class Mentality 

Upper Class Mentality is seen often, if not primarily, from middle class individuals. It is the attitude that they are a huge success and all others are inferiors. People with an UCM (pronounced You-See-Em) generally drive a slightly better than average vehicle, and have a slightly nicer than average home, while looking down at those who have not acheived this "status". These folks are very prone to bankruptcy and heartbreak once they realize they truly are not better than everyone they look down upon. This is a chronic condition, and coming to this realization may never actually happen. Keep your eyes open, you see em? :)

Susie: Hey Joe, look at that arse with his nose up in the air driving his big SUV. You see em tailing that guy in his rusty old car?
Joe: Yep, he definitely has an Upper Class Mentality.

John: Why does Larry always act like he is better than everyone, and talk about his boat? I hear he can barely afford his payments.
Wolfgang: Yep, he is a UCM.

A suburbanite is a great definition/example of someone with an Upper Class Mentality

Upper Class Mentality by drocco21 February 22, 2014

Upperclassmen 

(high school) Upperclassmen are the 2 highest grades of high school. The Juniors, and the seniors. Juniors and Seniors are the big grades of high school. Sophomores are not yet upperclassmen but they're more respected than Freshman. Freshman look up to upperclassmen. Many Freshmen feel intimidated by upperclassmen. But its good for the Freshman to *try* to get on their good side.

The Upperclassmen and the Freshman.......(STORY)

Freshman: "Hey whats up? I heard theres a party tonight, can you tell me where its at?

Junior: Um...Your a freshman right?

Freshman: "Yeah"...

Junior: AAAHAHAHAHAHAHAHA!

THE EEENNNDD!!

Upperclassmen by FlyLikeABird July 19, 2009

shiny upperclassmen syndrome 

When a boy becomes more appealing to a girl simply because he is older than her, specifically if he is an upperclassman (junior or senior in high school). It seems many younger girls are drawn to older guys for this reason, even if he doesn't really have much else going for him. For girls, dating up is somewhat prestigious.
I suppose this could also apply in college, but I have not yet come across that scenario.

"Why does she even like him? He isn't very cute and his personality is just so-so..."

"She must have shiny upperclassmen syndrome."

shiny upperclassmen syndrome by apersonfromnova January 11, 2012

Upperclassmen 

The Juniors and Seniors of a high school they are attending. In other words, eleventh and twelfth graders.

Often they are feared the non-upperclassmen, usually freshmen.

Eleventh Grader: YES! We're eleventh graders! That makes us upperclassmen!!!
Ninth Grader: Uh-ohh.... I'm afraid of getting in the way of an upperclassmen....

Upperclassmen by xairbearx June 29, 2009

Upperclassmen 

Upperclassmen are the juniors and seniors in high school or a 4-year college. Freshmen are often intimidated by them, due to the upperclassmen being older than them and knowing everything more than they do.

Sophomores are still in the underclassmen ranks, but appear to be more respected than the freshmen. Usually when school is out for the summer, the sophomores are excited to become upperclassmen (aka: juniors) the following year. The juniors are excited to become seniors, and the freshmen are worrying about what will happen to them when they become sophomores.

Here's a story...

Sophomore 1: Hey, school is out! And in 3 more months, we will be upperclassmen! Also known as juniors!

Sophmore 2: Ikr! It's gonna be so cool! We can be twice as cool like the seniors!

3 months later...

Junior 1: Yes! We are officially juniors! Lets go scare some freshmen, shall we?

Junior 2: Hell yeah!

After the prank...

Freshman 1: Why do upperclassmen have to be so mean?

Freshman 2: Probably, because they think that they know everything more than we do

Upperclassmen by JellyBean600 June 20, 2018

Upperclassmen 

The two highest grades in High School before College. They are Juniors and Seniors, and are absolute dickheads to lowerclassmen just because they exist. However, not all are this way, but most of them that you'll meet will hate lowerclassmen for no reason. Once lowerclassmen become upperclassmen, they want that feeling of power, and will repeat the harassment that the previous upperclassmen did to them.

Upperclassmen: Haha! You lowerclassmen are nothing but mislead fucktards that don't know your place! We will pick on you, treat you as inferiors, and make fun of you until we leave out of this fucking dump for good! Pick up my shit, hand it to me, and don't make us mad!

Upperclassmen by ShxdyNeo May 14, 2019

Upperclassman

Someone who is older than you, or higher than you. Translated it means senpai in japanese.

"He greatly respects Mamoru, who is an upperclassman at his school."

Upperclassman by KattTheWeeb August 1, 2018