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The best; the most favorable condition or greatest degree or amount possible; first in rank or degree; in a most excellent way or manner; the thing that is most outstanding or excellent; something that tops all others.
Dude, the lake trip is going to be so proptimum!

Local Yogurt is proptimum!

Yo, last night was so proptimum!

Do you have the proptimum angle to see the screen?
by Matt&Katie May 19, 2010
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