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Adjective: niffy (niffier,niffiest)  ni-fee
Usage: Brit
  1. (informal) malodorous

Derived forms: niffiest, niffier

See also: ill-smelling, malodorous, malodourous [Brit, Cdn, non-standard], minging [Brit], pongy [Brit], stinky, unpleasant-smelling, whiffy [Brit]