Hallowmeme 

A halloween party where the costumes are meant to be memes.

Zach: Dude, check out her mudkip costume.
Friend: yeah, this is a great hallowmeme party.

Hallowmeme by Reinku November 1, 2010

HallowMeme 

The spookiest and dankest memes of the year found only during the month of October, when they are most powerful.

Ampes: I hate it when chef makes us post HallowMemes for a contest just to give it to a verified account that is already popular.
Chef: Banned

HallowMeme by Ampes October 27, 2017

HallowMeme 

The spookiest memes of the year found only during October.

Sometimes used by Chef to make a contest that will be given to a verified account anyways

Ampes: These HallowMeme contests are rigged for only popular accounts.
Chef: Banned

HallowMeme by Ampes October 27, 2017

Halloweekend 

When the holiday of Halloween falls on a weekend (being a Friday, Saturday or Sunday), the entire weekend is then dubbed to be a Halloweekend. It may refer to the entire weekend being considered as one large, three night holiday.

John: Hey what are you plans this weekend?

Linda: Halloween is this weekend, I have some mad parties to go to during this halloweekend.

Halloweekend by thecunningjoker October 29, 2009

Haplomemes

When people on messageboards and forums discuss genetics and make memes about genetics that include PCA charts or haplogroups. Often such discussion is repetitive and engaged in by people who know little about the subject but will post genetics related images anyway, for example equating haplogroups with personality traits. Thus the term Haplomemes is appropriate. Additionally haplomeme discussion can be more insidious; sometimes users post meme images that accuse another ethnicity/nationality of having some sort of undesirable lineage in some way, for example memes that suggest South or East Europeans are non-European and thus less worthy.

*sigh* 'another Haplomemes thread.' 'You don't know anything about genetics, you just spam autistic haplomemes'

Haplomemes by Haplogrouper June 20, 2019

Halloweekend 

The weekend before Halloween (starting on Thursday and ending on Sunday or whatever day Halloween falls on). It do not matter what day of the week Halloween is because parties happen all weekend long. Halloweekends are usually at colleges where they party hard. Many people have multiple costumes for each night of Halloweekend.

James: Man, my professor scheduled an exam the Monday after Halloweekend.

Ryan: That sucks! I'll be partying hard all Halloweekend!

Halloweekend by Cougargirl3 October 30, 2011

Halloweekend 

the weekend before and/or after Halloween. On years where halloween falls on a friday, saturday, or sunday, the weekend of halloween is halloweekend.

Halloween is next tuesday. I'm going to a spooky party this halloweekend.

Halloweekend by Elissa loverman November 1, 2017