copy and paste, possible bank?

I am fully aware of the copy and paste feature, but is there a way to save multiple things, such that you could paste them with different key commands - basically: you can copy and paste more then one thing, without having to recopy things over and over.

Example would be:

Able to copy the text:
^3haha ^8really?
...and paste it whenever needed
but also able to paste something else that was copied prior.

Is there some feature or app to do this?
I think I've heard of it before, but not on a mac, and I'm not sure how it could work.

 

Thanks