Top definition
An incredibly dimwitted individual who is incapable of completing even the simplest of tasks. This person is also extremely gullible and easily manipulated.
Damnit Bob are you going to be a Derfla all day or do you think you can pull your head out of your ass eventually?
by doughgurl June 01, 2015
Get the mug
Get a Derfla mug for your buddy Callisto.