Idiom definition -- use someone as a pincushion

[KFEthridge]

Sirs:
I am having difficulty finding a definition for the idiom use someone as a pin cushion. Would you be able to define this for us, or would you know where a definition could be found?

Thank you,

K. F. Ethridge

[RonBee]

I don't think it is an idiom, but it is, I think, a metaphor. What is the context for that?

~R

[Tdol]

It's not a standard idiom that I have come across, but I assume it means to treat someone badly, without caring about their feelings or whether they get hurt.