a frequent misinterpretation of much older common expression 'fair deuce' meaning fair point, good play (as in tennis), often used informally to recognise good (verbal) comebacks.

Hard to distinguish "do's" from "deuce" particularly given regional and american accents which pronounce "u" as "oo"

by Moccus January 8, 2009
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Can answer to absolutely anything.

If something good happens to you it's fair do's, if something bad happens to you it's fair do's

or if you havent listened to the question you were just asked, or the answer you just recieved, fair do's will make everything ok, enjoy XD
1st person: Hey dude i got an A in my business exam
2nd person: Wow how did you do that?
1st person: I revised, bla bla bla yadda yadda yadda blaaa
2nd person: ohhhhhh fair do's
by Hitcher 1001 May 7, 2008
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To agree With some one / think. That you do not belive but cannot be bothereed to argue.
Jonny says "I think windows ME was the the best operating system"

Billy says "Fair Do's"
by Tony June 12, 2004
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Informal, often used in UK. Something you say when something is reasonable, similar to fair enough.
"Nothing much, you?"
"Fair do's"

(Doctor Who)
Wilfred: You know, I don't understand half the things you say these days.
Donna: Nor me.
Wilfred: Fair do's. You've had a funny old time of it lately.
by billybonk May 31, 2021
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used when u dont agree with somebody, but u cant b arsed arguing either.
-"alex the kidd would kick acid fairy's ass in a fight."

- "fair do's" (however really thinks wat a total fucknut)
by kelvin April 28, 2004
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