Crossword puzzle clue "you cool"

Cool like a cool cat

Super-cool ... or not cool at all?

Cool syst. for keeping buildings cool (or hot)

Cool, cool customer

"Cool," to a cool cat

"Cool," to those who think they're cool using rap slang

"You ___ not as cool as you think"

Baffles (ABOUT THIS PUZZLE: If you saw the headline "Fiend Found!" you might instantly notice that, between the two words, only the vowels change — the consonants stay put. Okay, if you were me, you'