yellow means cowardly
It means cowardly.
it means cowardly
If someone is a "yellow-belly" it means they are cowardly.
It means they are a coward.
When someone calls you "yellow", they are saying that you are afraid, craven, cowardly, etc.
cowardly
yellow fellow
extremely timid, cowardly
Frail Male, yellow fellow
In slang, "yellow" can mean cowardly, and it was used to characterize a form of sensationalist journalism in the late 1800's and early 1900's -- Yellow Journalism. In the United States before the Civil Rights Movement, yellow was commonly used for a light-skinned black person.
Lacking courage. See the Cowardly Lion in the Wizard of Oz.