Top Definition
Stands for "This Thread Delivers". If while surfing the internet, you come across a thread or forum topic that has some decent porn, to the fact where you actually get off from it, you can let the world know by simply saying TTD.
Oh man...I can't believe all the pics of what that chick just did.

by BTmoney June 17, 2007
Textually Transmitted Disease. Also known as memes. On-line quizzes and surveys and other like things that people either post to their pages or e-mail to their friends, so that all their readers and friends may do the exact same thing in turn.
Examples of TTDs can be found here:
by assassinscloak October 06, 2008
Take The Dick
Damnnn that girl is mighty fine, she can TTD!

i heard she can TTD like a champ
by picking my nose February 28, 2011
TTD (Temperament Trending Downward)

Where -- quality of mind, mood, sensitivity, nature, disposition, outlook or character begins to or becomes: calm, serene, composed, unruffled, nonchalant or imperturbable.
As the speaker increased my anger I quickly viewed my phone nature pic’s causing my TTD to reach a tolerable level.
by crustyman June 10, 2010
A toelly transmitted disease (TTD), also known as toelly transmitted infection (STI) or toenailreal disease (TD), is an illness that has a significant probability of transmission between humans or animals by means of foot induced sexual contact, including toe scissoring, toeing a male / females genitals and sharing festy shoes. While in the past, these illnesses have mostly been referred to as TTDs or TD, in recent years the term toelly transmitted infection (TTI) has been preferred, as it has a broader range of meaning; a person may be infected, and may potentially infect others, without showing signs of disease. Some TTIs can also be transmitted via use of a set of nail clippers after its use by an infected person, as well as through moonwalking barefoot or standing on toilet seats. Toelly transmitted infections have been well known for hundreds of years.
I was playing footsies with Suzie during biology barefoot and the bitch gave me atheletes foot!!

I got my toe's sucked last night and the bitch is complaining I gave her a TTD! How was i supposed to know I had warts inbetween my toes, who even looks down there?
by Dr. Jean Spickleberg Snr September 26, 2009
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