A word that everyone knows the meaning of but nobody knows the meaning of.
"Dude can you get me some kevick fundeez???'
"What are kevick fundeez??"
"How do you not know what kevick fundeez are?"
"I don't know, what are they though???"
"It's just unbelievable how you don't know"
"WHAT IS IT???"
"I just don't understand how you don't know man."