Top Definition
1)in the act of agreeing with someone; beyond "yup" and "yup yup"uber agreement in 2)something or with someone
3)agreement along with excitement for a certain topic
if cool can be converted to coolness to intensify the significance. then yup can be extended to yupness to increase the intensity of agreement between 2 or more people.
by evilchild101-11-11 April 13, 2009
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