Smackeroo is a slang term used to describe a large amount of money. It is derived from the combination of two words: 'SMACK' and 'kaboodle.' The first word, 'SMACK, ' is an informal term for a large sum of money, while the second word, 'kaboodle, ' is a colloquial term for a large quantity or group. Together, they form the term 'smackeroo, ' which is used to refer to a large amount of money. The crossword solutions for the term 'smackeroo' are ONE (3 letters) and CLAM (4 letters).