Definition of «long tube»

The phrase "long tube" refers to an object that is cylindrical in shape, but extended or elongated in length.

Then roll it into a 40 cm long tube with two hands. (en.christinesrecipes.com)
Its fun up to double overhead with long tube rides, but over that it becomes one serious wave that walls and walls and walls. (gili-paradise.com)
Basically your gut is one long tube from your mouth to your butt. (thehormonediva.com)
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