A process of deciding whether you care or have an
opinion about any thing, policy, concept, idea, etc, by stripping it down to its most
basic parts. If you are motivated enough to have a position/
opinion on any of its parts, then it can be said you give a rat's ass about the topic.
Basically a way of determining whether you give a rat's ass about a specific issue, topic, etc.
Normally, I could give a rat's ass about the New
York Yankees. However, since they drafted former Nebraska Cornhusker Joba Chamberlain; I have an interest in them; and how the
Yankees are doing passes my rat's ass quotient.