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1.
A slang proclamation of agreement or confirmation. It is normally verbalized as a stand-alone word when a slang is called for, similar to the use of "yup". A speaker will prefer "affirmatory" to "yup" when he or she does not want to pronounce the "p", which is more disruptive to breathing.
"Affirmatory" - Jason S.

Unintended use: "I say, with regard to your inquiry, affirmatory"
by Scott J. March 06, 2006