Facepalmist 

A facepalmist is someone, who by virtue one's idiocy (unaccountable by a disease or disorder), gives the reader/listener an inevitable, painful collision between one's palm and the face, one of the reasons being the utter disgust of having to share the identity of "human" with the facepalmist.

This person is not the regular ignorant person (which is basically each one of us) who says something stupid once in a while. Both the quantity and quality of stupid matters, he/she has to be very stupid and often stupid. The suffix "ist" is justified by the expert level stupidity in a facepalmist.

Facepalmist: If some stars are 100 light years away, then how do I see them? I am not 10 million years old, stupid cosmologists!
Anyone with basic common sense: *Facepalm*

Facepalmist by psychsatani December 23, 2013

facepalmingly 

Adjective form of the progressive verb facepalming (the act of raising one or both hands to your face when something stupid happens). When something is really frustrating and stupid and you end up realising it's facepalmingly stupid.

Michael Gove's education reforms are facepalmingly stupid.

facepalmingly by Nonflyingfarang September 10, 2013

facepalming 

Like, embarrassing, etc., but with a facepalm, too.

Obviously.

OMFG, this is facepalming!

facepalming by khalyd January 22, 2011

Facepalmtastic 

1. When the best, or only, appropriate response to a situation is a facepalm from a third party, because words just cannot describe the full extent of thoughtlessness or idiocy as is evident.

2. When you see firsthand, or hear about, somebody doing something so stupid that you cannot imagine said person NOT facepalming themselves, so you facepalm out of pure sympathy.

This textbook is facepalmtastic because the publisher let the author get away with saying this:

"Cultural Studies insists that culture must be studied..."

EXCERPT FROM:
Dines, Gail and Humez, Jean M. "Gender, Race and Class in Media" 2 ed. page 10.

Facepalmtastic by Jewfish65 October 18, 2008

facepalmextreme 

to steal all the co op kills in LoL as Master Yi

You totally just facepalmextreme'd me.

facepalmextreme by KohanaSushi May 18, 2011

facepalmitude 

When something fails so much it earns a facepalm.

Bob: Hey look at this article about a church hiring scientists to help them find God!
Steve: I just got my daily dosage of facepalmitude

facepalmitude by I'm Out Of Ideas March 30, 2010

facepalmsunday

In Finland, facepalmsunday refers to the historic parliamentary election day of Palm Sunday 17. April 2011. On facepalmsunday the nationalist populist party True Finns gained 39 seats in the 200-seat parliament, compared to the 5 seats they had gained in the previous elections four years ago. This made True Finns the third largest party, as opposed to the 8th place they held before. It was a huge shock for everyone who did not vote for True Finns.

The term facepalmsunday was probably first used in this meaning in this Twitter message during the vote counting: https://twitter.com/#!/yousifabdullah/status/59702195561570305 The origin as a Twitter hashtag contributes to the fact that the word is written as a compound word, as opposed to two words "facepalm Sunday", because hashtags cannot contain spaces. Also, Palm Sunday is properly written as a compound word "palmusunnuntai" in Finnish.

I almost choked on my drink when the preliminary votes were published on facepalmsunday.

facepalmsunday by ZeroOne^ May 9, 2011