I tend to like gross words. This makes me a good fit for teaching middle schoolers.

I love the word rotundity.

German has some of the best words, though.

Schleim = phlegm
Scheinwerfer = headlight (literally means light thrower)
Verstopfung = a really uncomfortable digestive condition...note the word "stop" in the middle there.
Durchfall = the opposite of Verstopfung...note the word fall in the middle there...by the way, durch translates to through. You do the math.

I love words that sound like what they mean. German's great for that.