The term would later be used in civilian context to decribe the action of anything going FUBAR immediately or shortly after its beginning.
Person 2: I don't know but I really want to meet her!
Person 1: Must be a Cato (:
Used primarily in text language when replying to a joke that is not funny enough to warrant 'laugh out loud' but makes you smile or chuckle to yourself.
person 2 replies: CATOS :o)