O/T 

Used on forums to show if a thread is off topic (O/T) from the forums main theme.

This thread has nothing to do with what this forum is about noob, it's O/T.

O/T by urinebleech September 28, 2008

O.T. 

a reffrence to the female and male sex parts

Boy: Wanna use our O.T.'s tonight

O.T. by LIL PENE February 20, 2018

O.T. 

1. Short for Oil Tanker: which refers to a large broad
2. An overweight female
3. A Heffer

Friend 1: Yo man, check out that girl over there.
Friend 2: Who? That hottie?
Friend 1: No, the O.T. beside her, she'd be perfect for you, HAHA!

O.T. by Tyler O'Neill October 17, 2007

O.T

Ottawa, Canada Canada's national capital also known as 613

canada's national capital is O.T

O.T by nobody1 October 4, 2006

O.T. 

An elderly person: Old Timer.

Social Security is for O.T.s!

O.T. by Pitseleh January 23, 2008

O/T 

Acronym for "Orange Testicle". Mentioned on the Propellerhead forum as possible name for a new software synth. A sack of fun!

I've programmed some very organic, musky patches on my orange testicle(O/T).

O/T by edx500 July 28, 2011

o.t

Not conforming to mainstream

Donald:" Hey do you have tumblr?"
Rakim: "No I keep it o.t."

o.t by A$AP gambino December 28, 2013