The same way any other slang does - people start using a word in a specific way and others copy it until it means something new.
Other than being slang and Anglo American, the origin is unknowm
It's American slang for Christmas from Minnesota.
The American slang for language is "lingo" or "jargon."
American Slang was created on 2010-03-01.
All right IS American slang - you might also say "OK."
Stugots in Italian-American slang means "balls" in English slang.
The american slang for a conversation between several people is to make a dialoge
Cheaters are old slang for eyeglasses
Slang came to the Netherlands when the first human beings did. People have always used slang.
Puma in American slang is someone who is 30-40 dating someone who's around the age of 20.
"Gwap" is African-American rap slang for "money."
Slang is language constructs that are indigenous to a particular geographic area, or a certain group of people. All languages have slang, but American English is probably richest in slang. Differences in American and British slang sometimes cause embarrassing moments. In British slang, to "knock someone up" is to wake them from a nap. That slang expression has a very different meaning in the USA.