The word "currishly" is an adverb that describes someone behaving in a mean or unkind way. When someone acts currishly, they might be acting in a way that shows they are not nice or considerate of others. It often suggests a sneaky or cowardly type of meanness.
In summary, "currishly" is used to describe actions done in a mean or dishonorable way. It emphasizes not just the unkindness but also a lack of bravery in facing the situation directly.