Wiktionary
doogh
alt. A savory Persian yogurt drink with a mint flavor. n. A savory Persian yogurt drink with a mint flavor.
Wikipedia
Doogh
Doogh (, , tan, Iraqi: shinēna) is a savory yogurt-based beverage popular in Iran and Azerbaijan, It is sometimes carbonated and seasoned with mint. Outside Iran and Azerbaijan, it is known by different names.
Doogh is described as being either the same as or very similar to the Turkish beverage ayran.