The children used slang as a secret language, not realizing their parents had cracked their codes long ago.

I observed many forms of slang being spoken between the teenagers, but I could not comprehend the context of the words used.

Please speak to me using proper English grammar because I can’t understand your slang.

The woman became frustrated because no one could understand the slang that was common in her culture.

As the man began to speak, no one could understand or interpret his southwestern street slang.