"Flibberquark" is a whimsical and nonsensical word, and it doesn't have an established meaning in the English language. It's the kind of word you might use in playful or creative contexts when you want to invent a word to describe something imaginary or humorous. Feel free to give it any meaning or context you like in your creative endeavors
"During the zany comedy show, the comedian pulled out a rubber chicken and declared, 'Behold, the mystical Flibberquark of laughter!' as the audience erupted into fits of laughter."