“Self laugh” (Latin). Reacting to one’s own comment or post with a “haha” or smile emoji indicating recognition of humor. The Joker (character from the Batman universe) is well known for using frequent verbal guffauto by maniacally laughing after making an ominous or threatening statement.
Dude, that joke was so lame I can’t believe you gave it a guffauto!
The word originates from the Moors who during the battle of tours in 732 created the word to insult the majority of ginger haired people they were fighting against. Word stems from Kuffar(Infidels).
Eat that food before God turns you into a guffar.
Don't be such a guffar.