Factos

Used as an attempt to label your preferred stance or opinions on a matter as "facts" especially when that stance is not backed by evidence.
Warning: Using this word in seriousness is typically a sign of insecurity.
However it is fine to use this word as a troll.

Me: I'm the best, my sister knows this to be true. Right sis?
sister: Factos. I shall write an essay on instagram to establish this "Truth".