I would take 'dump' flaps to be get rid of them - i.e clean configuration, and 'drop' flaps to lower them.
However a/c type is an issue as well. On Cessnas you lower the flap lever to lower the flaps, whilst on Piper, you raise the flap lever to lower the flaps.
Is dumping/dropping in relation to the flaps, or movement of the lever to get the flaps to where youy want them?
A good reason to follow SOPs.