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An amount of a substance measured out with a 1/32 teaspoon size scoop (often found in containers of pure stevia extract powder).

Popularized by the creators of the Trim Healthy Mama eating plan.
I only added three doonks of stevia to the cup of tea and it was sweet enough for me.
by charcoaldrawing June 14, 2016
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The sound that a piece of feces makes when it plops into the toilet.
Bob: Hey Pajeet. You in that stall. You takin a dump?

Pajeet: Doonk!

Bob: I'll take that as a yes. Don't forget to flush!
by trendyboy November 19, 2018
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Someone who plays phone games with the volume up (typically listens to dubstep and is a god at geometry dash)
Me:*playing geometry dash with volume*
Friend: shut up, doonk
by Toe sucker696969 July 19, 2018
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