Affirmatory

[Ernesto]

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.

[Sonia]

Agreeing with or confirming a statement.