Definition of Noddy suit in US English:

Noddy suit

noun

British
slang
  • A suit of protective clothing, including gloves, overshoes, etc., issued for use in nuclear, biological, or chemical attacks and intended for use with a protective mask.

Origin

1970s; earliest use found in British Army Review. From a first element of uncertain origin + suit.

Pronunciation

Noddy suit

/ˈnɒdi ˌs(j)uːt/