have a yellow belly

have a yellow belly

To tend to act in a cowardly manner. Of course Tom didn't come and defend his views at the rally—he has a yellow belly!
See also: belly, have, yellow
Farlex Dictionary of Idioms.

have a yellow belly

 and have a yellow streak down one's back
Fig. to be cowardly. Tex has a yellow streak down his back a mile wide. He's afraid to cross the street!
See also: belly, have, yellow
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • be yellow
  • yellow
  • yellow-belly
  • airing
  • air (one's) belly
  • air belly
  • air one’s belly
  • bellies
  • belly fiddle
  • belly button