spanking new

From spanking (“brisk, fresh”) +‎ new.

spanking new

1. (slang) Utterly new, as new as possible.

• brand new
• brand spanking new

• “spanking new”, in OneLook Dictionary Search.
• “spanking new” in Longman Dictionary of Contemporary English, Longman.
• “spanking new”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.