That’s __! Looney Tunes’ Signoff
Puzzle 10 of Aliens Pack
Question is: That’s __! Looney Tunes’ Signoff
and the answer is: ALLFOLKS
Word Meaning:
ALL — Every individual or anything of the given class, with no exceptions (the noun or noun phrase denoting the class must be plural or uncountable).
Definitions from Wiktionary.