bunny suit

Short definition from Wiktionary

Noun

1. 1
   A rabbit costume.
2. 2
   A Playboy Bunny uniform, for waitresses of Playboy Clubs; see also bunny girl.
3. 3
   A cleanroom suit.
4. 4
   A hazmat suit, or chemo- or biosafety suit.

Verb

1. 1
   To wear a bunny suit.