It's the first swiss word you learn, because it's so hard to say for non-swiss. It means kitchen cupboard.
When a guy from switzerland walks through a cheap shopping street in any foreign country (by example egypt or mexico), the seller says following:
Seller: hey are you swiss?
Swiss dude: erm yes
Seller: Kukikaestley
Swiss dude: Yes i know that word, but it's pronounced different.
Seller: Kuchikästlee, Kuchichästli
Swiss dude: Yes, correct (and walks away to the next seller that "has been to Switzerland")
literally means the act of clamping your teeth but is used to refer to both aggression or a sudden rush of affection (cute aggression) that may make you want to squeeze someone.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.