Somewhat or somewhat like a Cockney; having some Cockney characteristics or qualities.
From 'Cockney' plus the suffix '-ish' (indicating partial quality or resemblance). The '-ish' suffix softens the meaning to suggest 'somewhat' or 'rather.'
The '-ish' suffix is wonderfully vague—'cockneyish' means not quite fully Cockney, maybe just a hint of it, or Cockney-ish in a mixed or partial way!
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