Usako 

1. Japanese name meaning "bunny child".
2. The online alias of a popular fan sprite artist for the game Ragnarok Online.

Her name is Usako because she was born in the year of the rabbit.

Usako by Usako December 28, 2007

Usako 

1. n. A japa-hapa with the most focking cool comebacks that make you give up no matter what; this mostly applies to egotistical assholes and people who are insecure.

2. v. To bitch slap someone

3. adj. An unearthly, unreal place

1. Omg..THAt girl is SUCH a Usako! -.-
2. I'm so gonna to usako you..

3. Wow..this field is almost..usako..

Usako by Amy February 10, 2004

Usaki 

Usaki is the shortcut for the pairing of Takumi Usui and Ayuzawa Misaki of the hit anime and manga series "Kaichou wa Maid-sama!".

Some fans have apparently given the pairing a "full" name which is Takuzawa Usaki, which is the mix of their first and last names.

"Usaki is my favorite couple!"
"USAKI FOREVAR! /shot."

Usaki by Moira Dee May 1, 2011

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

ustakood 

(v) to used to be able to

we ustakood do that, but not no more

ustakood by crystalcafe October 24, 2003

USACO 

USA Computing Olympiad
Most commonly pronounced as: You-Suck-Oh (or less commonly; You-Sack-Oh)

A 4-hour long, online programming competition for highschool kids where there are four divisions: Bronze, Silver, Gold, and Platinum. Each division features different types of problems, such as sorting, binary search, DP, greedy, graph theory, blah blah, etc.

Helpful Side-note:
Once you reach the 4th division (Platinum), you will realize that the pronounciation of the name makes sense.

Gaddamit, I forgot ONE edge-case for my program, and that killed 8 test cases!! Gaddammit, I missed the USACO Platinum cuttoff by ONE test-case..... Gaddammit, my code won't even compile!!

....I realized that I was a USACO(You-Suck-Oh).

USACO by usacokiddo January 11, 2018

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