OTK 

A One Turn Kill (OTK) is achieved when a player wins a Duel in the space of a single turn, as soon as said player has the appropriate cards in hand and has control over the duel. This is similar to a First Turn Kill, but the latter is pulled off during the player's first turn, while an OTK can be accomplished at any point of the duel (meaning that all FTKs are OTKs, but not all OTKs are FTKs).

Kaiba: Ha! In three turns, I shall summon my Blue Eyes White Dragon and decimate your remaining life points!
Yugi: Perhaps, if victory were not within my grasp this turn. Prepare for an OTK!

OTK by Seylink October 30, 2013

OTK 

Stands for "over-the-knee spanking." It comes from a subculture known as BDSM, SM, or S&M. It is usually used by a Dom/Domme to punish a sub (or, depending on which way you look at it, arouse a sub). Pretty much self-explanitory; a spanking given while the sub flipped over the Dom's knee, much like you would spank a child.

sub: "N-n-no Sir!"
Dom: "What? 'No, Sir?' --get over here for an OTK!"

OTK by Sub/Kitten May 16, 2006

OTK 

over the knee, as in spanking

-Daddy, I don't want to do that right now.
-Do what I say bitch, or you're getting an OTK spanking!

OTK by PF Neville February 23, 2004

OTK 

One true king

Simba is the OTK

OTK by GrandpaB May 30, 2016

OTK 

One True King , an entertainment/ org created by the many gods of Azeroth

Asmongold the mald king , Mizkif egglord, Esfand the paladin crusader , Rich Campbell the legend himself , and Tips Out.

OTK is the fucking shit dood , this is what long dick style looks like

OTK by Bolvar former "Bitch king" October 16, 2020

OTK 

over the knee - as in boots that rise above the knee.

Traditionally thought of as racy and kinky, this fall (2009) the mainstream shoe stores are well stocked with OTK boots.

OTK by bluelizard July 15, 2010

OTK 

An infamous krew in Victoria that stands for out to kill.

Where have you been?
With OTK kacoking

OTK by richarddudeman August 17, 2011