from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To fish by letting a baited hook fall gently onto the water.
- intransitive v. To dip lightly or quickly into water, as a bird does.
- intransitive v. To skip or bounce, especially over the surface of water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A plimsoll
- v. To run or go somewhere quickly.
- v. Dap describes special examples of dipping, dabbing, or bouncing actions.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To drop the bait gently on the surface of the water.
from The Century Dictionary and Cyclopedia
- In angling, to drop or let fall the bait gently into the water.
Probably alteration of dab1.(American Heritage® Dictionary of the English Language, Fourth Edition)
Onomatopoeic, from the sound made when a person runs while wearing daps. (Wiktionary)