Words at Play : Top 10 Words for Useful & Intriguing Concepts
Definition:
something that ends or settles a matter; a decisive blow or answer
Example:
"Bobby Thompson's pennant-winning homer in 1951 is one of baseball's great sockdolagers."
About the Word:
It's unclear where sockdologer comes from, but it may be an alteration of doxology ("a short, often final hymn chanted in praise of God") influenced by the sock that means "punch."