Performing pseudonym of Li'l Abner Yokum in a run of comic strip Li'l Abner from January of 1944. In a spoof of the crooner craze, cartoonist Al Capp has his protagonist fall afoul of the conniving singer Concertino Constatio. Constatio can sing, but looks hideous. So he gets the idea to turn Abner into a crooner by starving and abusing him until he looks thin and haggard enough. Then Constatio will secretly provide the vocals while "McGurgle" lip-synchs.
Other Al Capp spoofs: