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1.
adjective that is typically used to describe someone that always posts shitty threads on message boards.
blueskyboris is the boringest poster on rantsnraves.org. Someone should neg rep him.
by brian sapient April 24, 2008
 
2.
the most boring thing relative to the group of boring things compared to
"you are the boringest person in the world"
by Aaron Cheng February 04, 2004
 
3.
Something that is incredibly boring
Steve: I wont be bored! I'll be with you

Jessica: How do you know? I could be like the most boringest person ever!!

Steve: I reckon youll be quite excitingest actually
by Synyster Gates 86 April 28, 2010