Blarg is to describe feelings all at once. Like if your happy, sad, angry or mad. You can say it in a sentence, like instead of saying tings like "I feel angry and mad." , you can just say "I feel blarg today." or just say the word itself.(Mostly if your mad)
A Canadianyoutuber, who is a member of the GOONS podcast, which consists of Sniping_Soup, TheDooo, McNasty and some guests from time to time. He also collaborates with many other youtubers such as Grizzy, Smii7y, Sp00nerism and Tuxbird.