You might not hear the slang term “ABC” very often but it was once a popular and widely-used word, especially in urban areas. Based on our research, we discovered that it has two meanings. Be careful as one of them is somewhat offensive.
The first use of ABC just refers to the basics or fundamentals of something. ABC are the first letters of the alphabet and are something that should be comprehended by anyone, hence, the meaning of this slang. You might hear someone say it like:
“You should know your ABC before trying to drive on the highway.”
Some might use it as an offensive acronym. It generally means “American Born Chinese.” It somewhat alienates and shows distrust towards the Chinese-American people. Some might use it this way:
“ABCs often get stereotyped in films. They have it hard enough!”