When someone behaves similarly to a
rat, more specifically a “pack rat”. One example of being ratful is hoarding excessively
even though you won’
t be able to use all that you have gathered. Another would be getting excited when you are in the presence of a large amount of loot or making rat-like noises. Being ratful isn’t necessarily a bad
thing nor does it mean you are greedy, it just means you possess rat-like tendencies.