British slang for kissing, especially romantic kissing.
Origin uncertain, possibly related to 'snuggle' or Scandinavian roots. First recorded in British slang around the 1960s, though may be older. The exact etymology remains debated among linguists.
British English has dozens of slang words for kissing—snog, smog, pog—but 'snog' became the most popular despite nobody knowing where it came from originally. It's a perfect example of how language spreads mysteriously through popular culture.
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