Verb: The obnoxious and aggressive thrusting of the pelvis, specifically of the male pelvis; potentially thrusting into an orifice of another person, stump, or other.
To hammer-dick: The man in the apartment unit above mine incessantly hammer-dicks his significant other every Sunday morning at 8:37 am.
Duppy hammer is used to describe a person that looks dead or in other words ugly. The "duppy" part describes how the the person especially a female look, the "hammer" describes the tool that the devil uses to do his work. Hammer is also reference to MC Hammer.