"their speech was full of slang expressions"
"they don't speak our lingo"
"The immigrant was duped because he trusted everyone" "You can't fool me!"
He wanted me to be..less colloquial, and was always rebuking me for using slang.
Bog is a slang word for toilet, and..you know the toilet will be a..smelly one.
My mother once heard her slanging an unfortunate maid.
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)