toot jar Share definition Flag a jar that one farts into in order to conceal the smell for a future indiviual to enjoy. Toot Jars usually have a tight plasic lid so none of the smell escapes. Ryan gasped as he opened the lid of my toot jar and took a great wiff. toot jar by Jason9 September 18, 2006 0 0 Get merch Get the toot jar mug. Buy Now — $32.95 See more merch