similar to a double negative, but with another negative added in, making a befuddling mixture of words that makes a negative statement.

an excellent way to disagree with someone and walking away while they try to figure out what you just said
Person1: hannah montana is a great singer

Person 2: i cant say i dont disagree with you (walks off)
(^triple negative)

Person1: wait...what?
by Jazz Hammerhands November 6, 2009
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A way of vocally pointing out that you are not smarter than the average bear.
An example of a triple negative:

Today one of my colleagues said “No-one has not done nothing for me”.

It makes me wonder if I am too intelligent for this job...
by flammable55 October 18, 2017
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TNBC refers to any breast cancer that does not express the genes for the 3 most common breast cancers, namely, Estero gen receptor (ER), progesterone receptor (PR) and HER2/neu. TNBC is more difficult to treat because most hormone therapies target one of the 3 receptors.

Triple-negative here hs a medical meaning. Triple-negative here does not mean an added negative to a double-negative.
Triple-negative breast cancer has a relapse pattern that is different from hormone-positive breast cancers.
by Waterbear March 5, 2019
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depression. the opposite of double rainbow. rather than orgasmic and euphoric amounts of happiness, it is quite the opposite.
Joe: You feeling double rainbow today?
Timmy: No. Actually I'm feeling pretty triple negative rainbow.
by tripledepression(y) November 30, 2010
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