It bothers me when people use the word mood for emotions or feelings. Mainly because growing up I was accused of being "moody." From that experience I came to believe that calling someone "moody" was failing to validate that the person has feelings. So moods, feelings, emotions - what's the difference? Basically feelings and emotions are thought to be interchangeable and the scientific term for them is "affect." Moods are basically emotions, but emotions are thought to have a clear focus while moods are thought to be more unfocused and diffuse. While emotions are instantaneous reactions, moods are emotions jumbled up with thoughts that affect outlook.