USAMO 

United States of America Mathematical Olympiad. It's a contest for the top 200 or so high school mathematicians in the country.

Only geniuses can qualify to take the USAMO, never mind win it.

USAMO by Johnny Estrada August 28, 2006

USAMO 

A difficult, prestigious math competition for the students with the top AMC + AIME schools in the United States. Simply qualifying for the exam means that you're among the best in the nation.

Thomas Jefferson of Science and Technology has more USAMO qualifiers than any other school in the United States.

USAMO by inquilinekea July 15, 2008

USMO 

You Should Move On

Did you hear John-Robert’s new song USMO?

It SLAPS.

USMO by Walru$ January 14, 2021

usemore 

The opposite of useless

When the sun is out a hat is very usemore

usemore by Skunkylove October 21, 2015

usamimi

Usamimi is a Japanese word that has combined two others; "usagi" which means rabbit, and "mimi" which is ears. As you can guess, usamimi really just means "rabbit ears".

Anime Girl: Look at me, I'm wearing usamimi!

usamimi by Rin Kagamine January 10, 2011

Usama Bin Laden 

How Fox News spells Osama.

Usama Bin Laden is dead.

Usama Bin Laden by their pseudonym May 24, 2011

unAmoreena 

The act of removing all of one's belongings from someone's home after house/pet sitting for a prolonged period of time. Especially if the house/pet sitter is named Amoreena.

Let me know your eta so I can unAmoreena your house in time.

unAmoreena by Amorific August 25, 2011