Gibberish (noun)

Speech or writing that is meaningless and hard to understand.

Origin:

The word gibberish is derived from the middle english word "gibberish" meaning "babbling or jabbering".

Examples:

1. The instructions were written in gibberish and we couldn't understand them.
2. He was speaking gibberish and no one could understand him.
3. The text was full of gibberish and made no sense.
4. The program outputted gibberish and it was difficult to debug.
5. The explanation was nothing but gibberish.