a cowardly, despicable person; a craven.
What Does 💛 Yellow Heart Emoji Mean?The yellow heart emoji can convey love, just like any other heart symbol or emoji, but its yellow color often gets used to show liking and friendship (as opposed to romantic love).
Origin of yellow dog
First recorded in 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for yellow dog
Now the philosophical pacifists—I don't mean the cowardly, yellow-dog ones—have never quite seen the war in this aspect.The Life and Letters of Walter H. Page, Volume II|Burton J. Hendrick