Brad: hey Riki, did you bone that chick Carol from the bar last night?
Riki: I sure did bro, unfortunately for me though I couldn't feel a thing, she had a fanny like an empty punching bag.
A punching bag oc is usually an oc made to be used in different horrible and gore situations for the viewers and artists intertaintment. A punching bag oc can also be used if the artist is suffering with mental disorders, and need a way to get emotions out.
When another person, typically the person you like, uses you to get rid of all their problems (anger, frustration, sadness etc.) and could care less about you.
This girl I liked treated me like an emotionalpunching bag. She always came to me when she had problems, but never really cared for me.