#:

A coded abbreviation for anal sex # being the pound symbol and : being colon. So to pound colon being to penetrate the anus especially vigorously.

Did you see that Gould in the porno #:

#: by anonymouskc September 30, 2018

'#'

Win! Two people have found the world's largest waffle and after a brief period of disagreement over who should eat it, they decide to share. Their decision wins.

Pauline : Marry me, Ben!
Ben : Of course I'll marry you! '#'! :D

'#' by BêñjíButton June 24, 2009

#

Used to be the sign for a number, but thanks to goddamn twitter its called a hashtag. possibly the most annoying key out there that kids use these days before the dumbest sayings and words. And don't think I'm an old party pooper because I'm 15 and saying this.

Sarah:#OMG
Allie: #swag
Jack: #ihateniggasstealingmybitch
Jeff: #throwbackthursday
Me: #ifuckinghatehashtags #fuckallofyou #imleaving

# by ak15 November 11, 2013

-.-#

This is a smiley used when you are pissed at someone. The "#" represents the veins popping out like common anime characters when they are infuriated.

A: Why are you so mad at me?
B: Because you cheated on me! -.-#

-.-# by mushypizza May 10, 2009

#

The symbol that Roblox's filtering system always uses. Often used to filter words out, but most likely ends up to filter harmless words.

xXMLGGamerXx: ## ## #### ## ####
doron922: xXMLGGamerXx is a ####
doron922: ## # #
doron922: # # # #
doron922: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

# by buy jiafei's products ✨ June 30, 2020

#%@!

#%@! can be used to censor words that wouldn't be appropriate to write uncensored, for whatever reason.

What the #%@!..
What the hell..
What the fuck..

#%@! by Barbara-Ann November 28, 2007

#!

The "shebang" syntax is the number sign followed by an exclaimation point and is embedded in most UNIX scripting languages to tell the computer what interpreter to use to run the script when the script is executed. This goes on the first line of your script, followed by the path to the program that will run, or interpret, you script, followed by a space and any other options you want to pass to the interpreter, finished by a carriage return. Nothing else can go on this line as seen in the Perl script below:

#!/bin/perl -w
#
# My first "Hello World!" script in Perl
#
print "Hello World!\n";

#!/bin/perl <-- Tells a computer to use the perl executable to run the script to follow.

#!/bin/ksh <-- Tells a computer to use the UNIX ksh (k shell) to run the script to follow.

... and so on...

#! by MikeStan May 9, 2007