Definition

1. Noun:
   • A small worthless amount: An extremely small or insignificant quantity of something, often used to emphasize the lack of value, importance, or substance.

Usage

• The word "diddley" is almost exclusively used in the informal, negative idiomatic phrase "don't know diddley" (or its more common variant "don't know diddley-squat"), meaning to know nothing at all about a subject.
• It functions as a placeholder noun to represent a negligible amount, typically in contexts of knowledge, money, or help.

Examples

• Noun:
  • After hours of research, I still don't know diddley about quantum physics.
  • He claimed to be an expert, but he didn't contribute diddley to the project.
  • This old car isn't worth diddley anymore.

Advanced Usage

• "diddley-squat": A reinforced, synonymous variant of "diddley" with the same meaning of "nothing at all." It is more common in modern usage.
  • I asked for help, but I got diddley-squat from them.
• "not know diddley (about something)": To be completely ignorant about a particular topic.
  • She doesn't know diddley about fixing computers.

Variants and Related Words

• Diddly: An alternative, equally informal spelling.
  • This information is worth diddly without proper context.
• Diddly-squat: The most common compound form.
• Squat: When used informally as a noun, can also mean "nothing" (e.g., ), but is less emphatic than "diddley-squat."

Synonyms

• Nothing: The standard and most direct synonym.
• Zilch: Informal slang for zero or nothing.
• Nada: Informal, from Spanish, meaning nothing.
• Zip: Informal slang for zero or nothing.

Related Idioms

• Not know jack / don't know jack: Has an identical meaning to "don't know diddley." ("Jack" here is also a placeholder for "nothing.")
  • Don't listen to him; he doesn't know jack about investing.
• For diddley: For a very small or worthless amount of money.
  • He sold his valuable collection for diddley.

Noun

1. a small worthless amount
   • you don't know jack