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Global slang
The basics; an introduction to a topic or concept.
Safe to use?
Usually safest with people who already understand the context.
Tone
Casual and context-dependent.
Region
Global
Formality
Informal.
101 means The basics; an introduction to a topic or concept. It is best read as global slang associated with Global.
"101" means The basics; an introduction to a topic or concept. In Global, the nuance may be more specific.
Casual and context-dependent.
Usually safest with people who already understand the context.
Context-dependent
Affirmative; I understand; message received (from CB radio/police code)
Outlaw; anarchy (often associated with biker/outlaw culture).
ACAB (All Cops Are Bastards), where the numbers correspond to the letters in the alphabet
I Love You (based on the number of letters in each word)
The end; all done (from journalism code for the end of a story)
Clueless; confused; not present (derived from the HTTP error code "Not Found")
Slang meanings vary by region, speaker, and context. Tell us if the meaning, tone, examples, or background should be updated.
SlangWatch entries are maintained by the SlangWatch Editorial Team using submitted examples, regional labels, tags, and ongoing reader corrections. We avoid claiming a precise origin or cultural pathway unless the entry has meaningful supporting data.