You Bet Your Fern Share definition Flag used in the book IT by Stephen King the kids use it in place of 'you bet your ass' Person 1: So was that fun or what? Person 2: You bet your fern it was. You Bet Your Fern by 'Salem November 11, 2009 0 0 Get merch Get the You Bet Your Fern mug. Buy Now — $32.95 See more merch
