Noun.

1337 gunbound/neopet hacker who began his hacking career in the year of 2004. He later was introduced to many other hackers such as Cao of HP and Zach of Mike's Aimbot. From there he learned to program and dominated the hacking world with his 1337(elite) skills. He currently resides at www.neocodex.us and www.unlimitedMGA.com

See 1337.
ONG!? 4r3 U r311y t3h S1N3R???!!11
by Sina Akbari May 9, 2005
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A name. Often an alias or a nickname. Sounds very badass. Often mistaken with "sinner", but has no connection.
Guy 1: "yo, you heard of that new guy Siner?"
Guy 2: "yeah, he seems pretty chill."
by Siin August 15, 2016
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Where you stick your dick in a rock and cum inside it
Oh did you see todd do the "dirty siner"
by PAPA STALIN999 November 2, 2021
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to jump really high with an intence amount of speed and power
"Stop jumping so sineralative, and settle down."
by Madandmental322 January 25, 2009
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