is informal non-standard speech; such as some vocabulary
and expressions that are created or developed from old or
new words by a group of people in a region or country in
an arbitrary manner. (To learn more Click Slang
America, 1914-present )
This popular expression is used to describe something that is
very good. Ex: That band is cool!
Pajamas: Used in the 20s, this expression is very
similar to "cool."
Other slang term that have similar meanings are: "radical,"
"groovy," "da-bomb," and
This can mean to calm down, for example, Chill out, Dude.
It also can have an "-in" ending added to mean to relax,
as in Were just chillin at my house."