"Beating a dick off" is not a common phrase or expression, so it is not clear what context you are referring to. It is important to communicate clearly and use appropriate language to ensure understanding.
Hop Off Dick
It depends which Dick you mean. If you mean Dick Turpin, it was Tom King. If you mean Dick Dastardley, it is Muttley. If you mean Dick Tracy, it was first Pat Patton and then Sam Catchem.
masturbating
You're giving too much head, lay off the dick for a few days
You have a dick on head
if you mean penis then its penisu if you mean the nickname Dick its diku dick as in slang for detective its keiji
by beating a stick off it
It means you gave boys head, a blow job.....like, put their dick in your mouth, etc.
Beating off on your dog in public.
Ishmael and Queequeg cut off the head of the dead whale in "Moby Dick".
Starbuck asked Captain Ahab if Moby Dick had taken off his leg. Starbuck was concerned about Ahab's obsession with revenge and wanted him to give up his pursuit of the whale.
That it is beating