A quick and curt way to end a conversation, putting a thin polite spin on the rude abruptness.

Most uses of this phrase are referencing actor Gene Wilder's portrayal of Willy Wonka in the 1971 movie "Willy Wonka & the Chocolate Factory," where Wonka informs Charlie he has lost the contest because he drank the burp soda, a breach in the contract he signed. "You lose! Good day, SIR!" Wonka screams at Charlie before turning back to his desk.

Linking to an animated gif of the scene with the audio intact is a popular way to assert you are done with an argument on the internet.
by Billions June 19, 2007
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One day, two marijuana enthusiasts smoked some rather potent weed. This weed did things to them like nothing they had ever smoked before. At the end of the night one of the stoners dropped off the second stoner, but before driving away he shouted "Good Day Sir" and drove off without saying another word. Ever since that day stoners occasionally use this expression in place of saying "goodbye"
DMS: See ya man, I'm out.

Jeff: GOOD DAY SIR!

DMS: Good day.
by Dank Master DMS February 13, 2005
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these three words may seem innocent, but they can trigger people almost instantly.
you may be saying " good day sir", but what they hear is "you're gay sir".
"good day sir" also goes hand in hand with "you're gay sir"
person 1: *slams hat onto the ground* "good day sir!"
person 2: *stops walking away and flings around on his heels* now right up in person 1's face "i am NOT gay!"
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An expression used at any random time to indicate epic fail, derived from Gene Wilder's line in Willy Wonka and the Chocolate Factory.
Brigitte: I read Twilight, New Moon, and Eclipse.

Me: You lose, good day sir!
by cacaivette November 20, 2007
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