The upmost of certainties. A declaration of unwavering commitment. 100% dedication
Guy 1: "Are nose beers on the agenda tonight?"

Guy 2: "100p"

Guy 3: "I'm 80p for nose beers" (do not be Guy 3)
by 5T1NGR4Y June 12, 2019
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one hundred percent. often pronounced "hundo p" or "hunna p"
Kelly: Are you going to the library tonight?

Allison: 100p I have 3 exams this week!!

Kelly: Damn that sucks you 100p need to celebrate after.
by 1738squaaa October 22, 2015
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