Breasts that are easily seen through shirts, typically on women who don't realize that they are wearing a shirt that leaves little to the imagination in the breastal area. Cuckooglies can be any size and are never illusive, you only need to be aware and they will appear to even the simplest of peeps.
Laurence: Yo check out that chick.
Humphrey: Which one?
Laurence: The one with the cuckooglies dribbling all over the court!
Humphrey: Oh! Bro she is super sick lets drop the howdy bomb on her and see where it takes us?