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

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

O.T

obsessive thinking.

“Oh my god , have you seen that new kid, Luke, I cannot stop thinking about him. O.T”

O.T by Happyhelper123 June 17, 2018

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. 

An elderly person: Old Timer.

Social Security is for O.T.s!

O.T. by Pitseleh January 23, 2008