. . . . . . "The yellow smiling face with the message \"Have A Nice Day\". Gained popularity as a Fun T-Shirt, and now has some parodies. Originally designed to stop postal employees from, well, Going Postal. The smiley face is also commonly used as a sort of ironic symbol of psychopaths, typically those who are also mentally ill. Compare Emoticon. Examples of \"Have a Nice Day\" Smile include:"@en . . . . . . "\"Have a Nice Day\" Smile"@en . . . "The yellow smiling face with the message \"Have A Nice Day\". Gained popularity as a Fun T-Shirt, and now has some parodies. Originally designed to stop postal employees from, well, Going Postal. The smiley face is also commonly used as a sort of ironic symbol of psychopaths, typically those who are also mentally ill. Compare Emoticon. Examples of \"Have a Nice Day\" Smile include:"@en . .