sour tooth

Noun

sour tooth (plural sour tooths)

1. (idiomatic, singular, uncommon) A liking for foods that are sour.
   • Robin and Jay Brown weren't the kind of kids to be caught with their hands in the cookie jar — they each had a sour (sometimes a half-sour) tooth, and pilfered pickles instead of desserts.1997 April 14, “Deep in a Pickle on the Upper West Side”, in New York, volume 30, number 13, page 26
   • Use about an equal weight of sugar (or less, if you've got a sour tooth), top with your favorite crumble or sweet biscuit topping and bake2014, Tricia Cornell, The Minnesota Farmers Market Cookbook: A Guide to Selecting and Preparing the Best Local Produce with Seasonal Recipes from Chefs and Farmers, Voyageur Press, →ISBN, page 59
2. (countable, idiomatic, rare) Someone with a liking for sour foods.
   • Some "sour-tooths" prefer a sweet, non-acid fruit to an acid non-sweet one, while others do not.1944, Journal of the Royal New Zealand Institute of Horticulture