vinegar donut Share definition Flag The act of urinating into the anal cavity during sex. Thereby giving her a vinegar donut. Dude I gave this awesome chick anal and was desperate for a piss so I gave her a vinegar donut. vinegar donut by Anal Pounder May 2, 2014 0 0 Get merch Get the vinegar donut mug. Buy Now — $32.95 See more merch