A form of masturbation commonly used by gothic males. It involves laying the penis across a flat surface (namely a table or bench) and pounding the penis with a large hammer until ejaculation occurs, or the penis becomes too purple and sore to continue. The word Spackel is derived from speckle, because the penis will go speckly after a prolonged beating. Spackeling is not to be confused with spackling.
For a graphic example of spackeling, see www.thepounder.com