"Reaction gifs" refers to animated images, often taken from movies or TV shows, that are used to express specific emotions or reactions online in a quick and entertaining way. Full definition
Then it takes this character and creates a bunch of reaction GIFs with it that you can send through the keyboard. (theverge.com)
We have gathered the best and the funniest gifs, from reaction gifs to offensive gifs going viral Frequency about 6 posts per week. (blog.feedspot.com)
I'm having trouble finding an appropriately disgusted reaction GIF for that statement. (mommyish.com)