Any use for old but unused ground coffee?

I have a mostly full can of cheap coffee (chock full o nuts) that an old roommate left here. It was tucked away in a high cabinet for probably at least 3 years. It isn't sealed so I'm sure it's no good for actual coffee but was hoping there might be another way to put it to use!

I couldn't think of where to ask this so I'm starting here since its technically food, if there's a better community to consult please let me know!