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It is a placeholder for a decimal integer in various programming languages
In the C programming language, the following code:

void main()
{
printf("%d", 6);
}

would give the output of

6

In that example, the %d acts as a placeholder for the number 6. So when it gets compiled, the %d gets replaced with a 6
%d by cheesepotato August 18, 2005
Related Words
daniel • Donald Trump • dylan • Davids • dick • dog • daddy • Dominic • douchebag • DADS
A markup used on aim to display the current date

See:%n
See:%t
%d by Richard [Zeratual] November 30, 2002
An emoji meaning that the user is dead inside but they are still smiling
Person 1: buzz feed is funny, here let me play some for you

Person 2: %D
%D by Dömbryßi January 18, 2019
Random person- Oli London got arrested :D
Another random person- :D :DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
:D by -Pastel Sushi Roll- October 5, 2020
A very happy smiley face
:D im verry happy!!!!!!
:D by Sam August 11, 2004
d
d
d by Lexy_Boy December 9, 2018
More from Urban Dictionary
Ulzzang true definition is "best & "face" = best face in korean. They are basically people with above average looks, sometimes with the use of photoshop and haduri who post their pics online, some becoming internet celebrities.
"Hey, see that chick over there? She's pretty enough to be an ulzzang. :D"
ulzzang by `r i k kit t y February 26, 2008
Word of the Day on November 7, 2026
EBK stands for "Elite Ball Knowledge." 1 In internet slang, "ball knowledge" originally referred to a deep understanding of football/soccer or basketball, but it has evolved into a broader term for having a highly sophisticated, deep, or niche understanding of any specific topic (such as music, movies, or subcultures).
Person A: "That scene was a direct homage to an unreleased 1982 Japanese indie film."
Person B: "Wow, EBK."
EBK by silwhett November 5, 2026
Word of the Day on November 6, 2026
A seemingly endless debate with a idiot
I don't know man im not ready for yap trap stupidity today which always tries to suck you into it
Yap Trap by WolfieSnack November 4, 2026
Word of the Day on November 5, 2026
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