slang 
/ˈslæŋ/ noun
/ˈslæŋ/ noun [noncount] : words that are not considered part of the standard vocabulary of a language and that are used very informally in speech especially by a particular group of people
▪ American slang ▪ local/military/street slang
▪ American slang ▪ local/military/street slang
— slang adjective
▪ a slang word/expression/term ▪ The word “phat” is slang.
▪ a slang word/expression/term ▪ The word “phat” is slang.
— slangy /ˈslæŋi/ adjective
▪ slangy expressions
/ˈslæŋi/ adjective ▪ slangy expressions
