This Watch Out meme is a rage comic character and reaction face of the astrophysicist Neil deGrasse Tyson making a defensive gesture when being interviewed about living and longevity. This image is sometimes associated with the catchphrase "Watch out guys, we're dealing with a badass over here" that is used to mock arrogant and boastful statements made by Internet users. Now , you can use it in your Slack, whenever it feels appropiate.