Top Definition
Most extreme, greatest, best.

People commonly mispronounce the word utmost, saying upmost.
I need the utmost quality out of these speakers I'm willing to spend thousands.

"This is the most upmost quality gum I've ever had"
"wait did you just say upmost ? Don't you mean utmost lol dumbass"
by Petty Crimes January 16, 2014
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