duff·er 
(dŭfər)
(dŭfər)n.
1. Informal
a. An incompetent or dull-witted person.
b. A casual or mediocre player of a sport, especially golf.
2. Slang A peddler of cheap merchandise.
3. Slang Something worthless or useless.
[Origin unknown.]
- Appius Claudius Crassus.
- applaud
- applaudable
- applaudably
- applauder
- applause
- apple
- apple butter
- apple green
- apple-green
- applejack
- apple of eye
- apple of (one's) eye
- apple of one's eye
- apple of Peru
- apple-pie
- apple-polisher
- apple-polishing
- applesauce
- Appleseed
- applet
- Appleton
- Appleton
- appliable
- appliance