slang
nounUK /slæŋ/
US /slæŋ/
Very casual words that friends use instead of formal words.
The word 'cool' is slang for something good.
RELATED WORDS
OTHER MEANINGS
2. To speak using very casual or rude words.
The kids slang at each other when the teacher is away.
3. The special words used by a particular group of people.
Computer slang can be hard for older people to understand.
4. Informal language that is not used in serious writing.
The essay was full of slang, so the teacher asked for a rewrite.