Can be seen in his wheelchair, minus his right leg, in the party scene
at Jim Backus' house in the movie
Mooch (1974) , which was filmed shortly before his death. The great character actor is having a good time in his brief cameo, and obviously is beloved by the other guests.
The actor lost a leg to diabetes in the mid-1960s.
Flippen was a vaudeville performer and recording star in the 1920s, recording 33 sides between 1924 and 1929 for Columbia, Pathe/Perfect, and Brunswick. He also made a handful of musical shorts in the early 1930s.