USAC 

USAC; (United States Auto Club), is an open-wheel auto racing sanctioning body for Mopar Midget National Championship, Sprint Car Series, Silver Crown Series and Ford Focus Series.

"Formula 2 races are governed by the USAC sanctioning body."

USAC by aliaz May 15, 2010

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

usacate 

- to train or educate someone on the usability or usefulness of something

EX1: After the new software has been written we will usacate the users, so that they will have a better understanding of the new product.

EX2: I don't need usacation. I am an expert with this tool.

EX3: Please usacate me on this new smart phone.

usacate by NightCastle November 24, 2009

USACP

USA Communist Party, AKA Biden administration and your beloved Democratic Party.

As a Chinese, I see a lot of common between USACP and the Chinese Communist Party.

USACP by CCP≠all Chinese. morons January 21, 2021

usachatnow 

one of the best chat sites on the internet. UsaChatNow is unlike most chat sites on the internet due to protection from the moderators. usachatnow.com and find out why.

usachatnow a great chat site

usachatnow by Usachatnow August 2, 2012

usachwcr

don’t be shy put some more super hot hear me out usachwcr

I’m usachwcr the hottie

usachwcr by joythathottie October 9, 2021

Usacan 

United States American irregardless of ethnicity, religious belief or politics.

What is a white guy doing in your car in this neighborhood?

We are USAcans. In uniform we are US Marines.

Usacan by Mattmandue July 26, 2023