Uboa is a character in a 32-bit PC game called Yume Nikki. He/ it appears in a random event in which you turn the lights off in Poniko's house, causing Poniko's sprite to change into Uboa. In this event, the room is changed slightly, and a muted "aaaaaaaaaaaah" sound is heard. He is known for surprising players.
Don't mess with the lights, or Uboa's gonnacom-aaaaaaaAAAAAAAAAAA
Derived from the Upvote function used in the online discussion board Reddit, this derogatory term is used to ridicule others for poor posting quality on discussion platforms; or otherwise conducting themselves in an immature fashion and in a manner which may be disruptive towards other users of the website. It is commonly used on the online image-based bulletin board 4chan, as well as other similar websites in which its users may share an aversion towards users of the website Reddit.
Annonymous 1:"Kek stay madfgt"
Annonymous 2:"Ahahaha ebin my dude! Upboated on leddit xDDD"