Top definition
For Nerds Only

Originating from M.M. herself at a private all girls school in Sydney, Australia.

Is used wisely across the year 12 community. Mostly as an insult. If you don’t know what FNO means, you probably are one.
Miah aced that business studies test, what an FNO moment.
by clickclackivansback September 20, 2019
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
by ecogoth December 30, 2020
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3
From Now On
A- Hi I am Mickey!
B- What? Mouse?
A- No.
B- I don't care.. FNO you are Mike! isn't that a better name?
A- Whatever you say sir
by TheFinalChoker October 27, 2009
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6
From now on
I'm keeping myself to myself fno
by Suckmymudda February 26, 2017
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