slang and idioms

[ahmed adam]

what is the difference in meaning between slang,idioms,colloquial and expression?

thanks for your expecting unswer

[Snowcake]

what is the difference in meaning between slang,idioms,colloquial and expression?

thanks for your expecting unswer

slang: very informal word or expressions, particularly used by a specific group of people.

colloquial: word and expressions used in spoken language; informal.

expression: a word or phrase.

For idioms see here: http://www.usingenglish.com/reference/idioms/