be milk toast—(U.S. sl., pejor.) be a timid person who is afraid to assert himself:
- He will have frequent battles with hospital officials…. A doctor who never gets into scraps with those around him is a milk toast.
be toast—(U.S. sl.) said of a person who will not succeed or will be in deep trouble:
- They may have gotten him in a position where if he doesn’t really shine in those debates, he is toast.