Serve as a guinea pig

Serve as a guinea pig

Fig. [for someone] to be experimented on; to allow some sort of test to be performed on one. (Alludes to the use of guinea pigs for biological experiments.) Try it on someone else! I don't want to serve as a guinea pig! Jane agreed to serve as a guinea pig. She'll be the one to try out the new flavor of ice cream.
See also: guinea, pig, serve
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • dawn on (someone), to
  • go to one's head, to
  • (not) give a fig
  • fig
  • (not) care a fig
  • give (one) the fig
  • at the mercy of somebody/something
  • palm off, to
  • fall for something/someone, to
  • keep an eye on, to