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Noun: plonker  plóng-ku
Usage: Brit, informal
  1. A stupid foolish person
    "blathering like the plonker that you are";
    - nincompoop [informal], poop [N. Amer, informal], ninny [informal], tit [Brit, informal], nong [Austral, NZ, informal], ning-nong [Austral, NZ, informal], mutt [informal], silly billy [Brit, informal]
  2. [Brit, vulgar] Obscene term for penis

Derived forms: plonkers

Type of: member, penis, phallus, simple [archaic], simpleton