Its tools mostly include dark colors like grey or black paired with red, combined with a malicious smirk.
While the exact origin of the expression is not known, “gesugao” was brought to the attention of a wider audience in 2013, when a video revolving around the phenomenon was uploaded to niconico.
Following this, its prevalence rose significantly in message boards and forums, like the /a/ board of 4chan.
“Gesugao” was defined on Urban Dictionary on September 5th, 2015.
Since then, the phrase saw features on image macro memes and various other content on sites like Tumblr, FunnyJunk, 4chan and even YouTube.