No, that’s not gibberish in the title of this episode, it’s Czech. It is a sentence just about anyone over here will quote when you mention vowels. It translates, more or less, to “Put your finger through your neck.” It doesn’t seem that useful in daily conversation, but it is notable for having no vowels at all. The Czechs are a frugal people, saving up their vowels, but they are also binge spellers, writing whole words with no vowels at all only to write others with strings of vowels, each of which is voiced.
I do not know enough czech to come up with my own vowel-free sentences yet, but it sounds like a fun game.