It is not often you would want to compare 'up'. Usually something is up or down or neither, if you are referring to direction. If you are using it to describe someone's mood, you could say 'more up' and 'most up'.
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The three degrees (of comparison) for adjectives are Positive, Comparative and Superlative. Example: hard (positive) harder (comparative) hardest (superlative)
Comparative and superlative form of up
wiser, wisest
i DON'T KNW
forer