The type of vodka you find in plastic bottles in the corner store, or on the bottom shelf of your neighborhood liquor establishment. These inferior brands of imbibes are known by their rot gut effects and terrible taste.
"You drink that cheap vodka, man that shit will give you a nice case of rot gut"
"You look like shit"
"I was low on cash so we had the cheap vodka, I thought I was going to puke my bowels."