I’ve complied all memes mentioned in this topic into one post (with a bit of editing to make things less personal, and the last one made by myself!). Should we edit the first post with this or shall I create a new topic?
Boon smiley
Coined by: the pr0oO group in 2008.
Consists in: posting a boon smiley (

) to express contempt regarding the above or quoted message.
The term 'boon' was used by the pr0oO group to describe idiotic individuals. It gave its name to the 'boon scores', but also to the corresponding emoticon, which became widely used and was even added to the Pirate Community smilies.
'Youhouhouh ! You stink !'
Coined by: Paolo in 2005.
Consists in: posting the 'Youhouhouh ! You stink !' expression to annoy and/or insult the targeted user.
This expression was first posted by Paolo to annoy the users of the English forums. It has subsequently been quoted numerous times for various purposes.
The Dango Smiley
Created: By El Dango in late 2008
Consists of: Posting the Dango Smiley (

) for slight annoyance, in place of another emoticon or just for the sake of it.
The Dango smiley was created by El Dango for fun,and its apparent coolness resulted in a sudden explosion of Dango smilies around the forum, and similarly to the Boon Smiley was added to PC's list of smilies. It has not remained as consistently popular as the Boon smiley however, as it never served any real purpose.
Building off the popularity of the Dango, Holy Crap created A greatly enlarged Dango smiley gif, complete with eyes that flash in annoying colours. This found popularity just as quickly as the Dango smiley, but due to its nature had a far more horribe impact; for a short period of time, all who visited PC were tortured by its poor outline and flashing colours. This torture was so severe that even it's creator came to hate it (not unlike Frankenstein and his monster) and in an attempt to scourge it from the internet, deleted it from his photobucket account, but not before it was saved by Acarr.
A-baba-dee-boop-ba!
Created: By Holy Crap sometime in 2008
Consists of: Usually posting the phrase A-baba-dee-boop-ba! in, or as the entirety of, a post for fun, annoyance or in the case of Record Day 2009, to earn tings from Holy Crap.
Holy Crap initially used this Musical Onomatapoeia for a small amount of time to annoy PC users and for fun. He edited it into the bottom line, added it to his posts and even created an account with that as its name, then set its birthday to be on those days so that it would display at the bottom of the screen.
He then unleashed it again in 2009's record day, having it copied and ready to paste on every post. He and Matyuv filled several pages of the Introducing topic that day, HC saying "A-baba-dee-boop-ba!
" (often preceded by "Indeed it is

") and Matyuv replying "Good

”
At one point, Holy Crap offered tings to other users to also add the phrase to their posts.
Toward the end of the day it was incorporated into a song Holy Crap created called "Record Day Blues".
Indeed
*needs more information*
Gangsta Globox
Coined by: Matyuv in 2005
Consists in: a poor quality picture of Globox drawn with the rechtangle tool.
The picture became quite popular, there is a special Gangsta Globox rank at PC. th3()ne created a tutorial how to make similar images and several members have made their own "Gangsta" creatures since then.
Hamish
Coined by: Serza in 2008
Consists in: Any reference to the real-life person Hamish and/or Serza's obsession with him.
Hamish is a boy Serza fancied in real life in 2008, so jokes ensued around her obsession. To this day, Hamish still doesn’t know about his popularity across the forums
(Buoni Gli) Spaghetti
Coined by: Canard WC in 2010
Consists of: posting the message “ buoni gli spaghetti, buoni gli spaghetti, buoni buoni buoni buoni, buoni gli spaghetti !

”. Usually taking a random noun out of context and replying with
I always thought those were… Spaghetti!
buoni gli spaghetti, buoni gli spaghetti, buoni buoni buoni buoni, buoni gli spaghetti !
LEACING THIS PALCE
Coined by: Rayman fan2000 in 2012
Consists of: *needs more information*