I know that it's an onomatopoeia, and it's an adverb that can take the と particle.
The context goes something like this. There is an object. The object in question is filled with a liquid. The object also has an opening in it. The liquid spills out, flows out, gushes out, and so on. どぼり(と) is attached to the said action of the liquid.
I looked on Denshi Jisho, and it has nothing on it. I looked on Weblio, and it has nothing on it. I even looked on this one website that lists sound effects, and there was nothing.
So does anyone know what it means?