the overall word for what is extremely cute. Used in many situations with the interjections "Oh" or "Ah!", Güchen defines all as being the cutest fucking thing in the world. To use güchen that means that a bunny rabbit in a field of flowers sucks monster cock to whatever you describe as cute.
Billy: "I failed my test today, but look at this puppy I got for my birthday!"
Evetta: "Oh! Güchen!"
Phillip: "Did you see Lesa's baby? It was SO cute"