TASK DEFINITION: Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
PROBLEM: Question: I'm looking for an idiom or expression that means someone just makes frustrating or disappointing remarks. Maybe some of you have watched the TV cartoon 'The adventures of Gulliver' in which there was as a character named "Glum". He was all the time pessimistic about everything and used statements like: "We'll never make it"; "We'll never get out of here alive"; and "We're doomed." I want to use that idiom or expression in examples like this: Husband: After getting my promotion, I will take you to a fantastic trip. Wife: Oh, stop talking nonsense! I know It won't never happen, it's impossible you get a promotion. Husband: You remind me of 'Glum'! All the time _____ (i.e. acting like Glum, just having a gloomy outlook on everything). Please stop using such remarks and be a little optimistic! I have found wet blanket for describing such people. PS: We Iranians use an expression that literally says "to read a frustrating or disappointing verse". So in above example, the husband might reply like this: Hey Glum, the only thing you know is reading a frustrating/ disappointing verse! (Sometimes we call these people 'Glum'.) 
Answer: I've always referred to those personalities as "Eeyores," from the Winnie the Pooh character.

SOLUTION: no

PROBLEM: Question: This is similar to a palindrome but, instead of a word/sentence that reads the same forwards and backward, is there a word for words/sentences that read the same right side up and upside-down? See picture below where the word "yeah" is written in cursive: 
Answer: Another answer is symmetric, although that's a broader term. More specific: that it has rotational symmetry. Even more specific: symmetric under a 180 rotation, or it has 180 rotational symmetry. A mathematician might say that it has the symmetries of a parallelogram.

SOLUTION: no

PROBLEM: Question: Perhaps you say a bad joke or you make a really awkward noise, and everybody suddenly stares at you? 
Answer: You could say that the room fell flat If a joke, idea, or suggestion falls flat, it does not have the intended effect: Cambridge Dictionary While it is primarily used to describe what was said, it can also be used to describe the room the statement was made in. Alternatively, you could say that there was a deafening silence deafening silence A noteworthy silence, or absence of response, especially one signifying disapproval or lack of enthusiasm. The suggestion that they work through the holidays met with deafening silence.

SOLUTION:
no