:#) 

A blushing emoticon.

boy: I think you are very beautiful!
girl: :#) Awww, thank you!

:#) by Blackenedhatter November 30, 2011

#:

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

:# 

When you try and type :3 emoticon but then you don't take your hand off the shift.

You're so cute!!! :#

:# by Isabelle-chinchilla June 17, 2020