worry wart (n.)youdaoicibaDictYouDict[worry wart 词源字典]
1956, from comic strip "Out Our Way" by U.S. cartoonist J.R. Williams (1888-1957). According to those familiar with the strip, Worry Wart was the name of a character who caused others to worry, which is the inverse of the current colloquial meaning.[worry wart etymology, worry wart origin, 英语词源]