adj. Only a few cakes achieve this divine, herpes-like state. That's going to sound awesome in the commercial.
Real citation: "its caketagious, highly infections desire to consume large amounts of sugary confections..... oooohhh sugar!!"
(Sept. 18, 2008, Twitter, http://twitter.com/elfinamsterdam/statuses/925737284)
Made-up citation: "The holidays are a caketagious time, doctors warn. Is that why I've gained 40 pounds in four days, and my skin has been replaced with a thick layer of frosting? I've never felt so moist, delicious, and desirable to the opposite sex and local rodents."