Thank you all for your kind help!
What I am looking for is something like this:
1) Winnie-the-Pooh has eaten all the honey.
2) Winnie will not share the honey with Piglet.
If greedy bastard can be used to describe both of these cases, what Latin adjective can do the same job? Does avarus convey the same two meanings? Can Quam avarus est! be applied to both of the situations? I am only sure about the second one.