An acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic.
Otd
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adj. An acronym for Off The Derekh. Derekh is the Hebrew word for path, alluding to the path that G-d delineates in the Bible which every righteous Jew must follow. Can be used to describe a person, an object, or an idea.
Otd meaning & definition 1 of Otd.
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Usually refers to Out-the-door. When you buy a two dollar 40oz beer, its an OTD.
Also refers to when you bang a chick thats so ugly, you have to brown bag her head.
Otd meaning & definition 2 of Otd.
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Obsessive Tumblr Disorder
One who uses Tumblr with all of their free time. Usually results in having no life once addicted. Describes about 99% of Hipsters.
Otd meaning & definition 3 of Otd.
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