Yup Yup

Some articles on yup, yup yup:

YUP
... YUP is a three-letter abbreviation with multiple meanings, as described below Yale University Press Young Urban Professional YUP (band), a Finnish progressive rock ...
List Of Tiny Toon Adventures Characters - Supporting Characters - Concord Condor
... is shown to be shy and dimwitted, often ending sentences in "nope nope nope nope" or "yup yup yup yup" ...