Pronunciation: [dɹˈaŋk wˈɒn dɹˈaft] (IPA) 
The spelling of "drank one draft" can be explained using the International Phonetic Alphabet (IPA). "Drank" is spelled /dræŋk/, with the letter "a" in "drank" pronounced as /æ/. "One" is spelled /wʌn/, with the letter "o" in "one" pronounced as /ʌ/. "Draft" is spelled /dræft/, with the letter "a" pronounced as /æ/ again. Overall, "drank one draft" is spelled phonetically as /dræŋk wʌn dræft/.
"Drank one draft" is a phrase that refers to consuming an entire serving of a beverage, typically an alcoholic one, that has been poured or drawn directly from a tap or keg.
The term "drank" is the past tense of the verb "to drink," indicating that the action has already occurred. "One" is used to denote a single unit or instance of something. "Draft" refers to a serving of beer, cider, or other type of beverage that is drawn from a tap, specifically from a keg or cask.
The phrase suggests that the person consumed the entirety of the drink in one go, without leaving any remaining. It implies a casual or informal consumption, usually in a social setting such as a pub, bar, or party.
The concept of "drank one draft" is often associated with the enjoyment of freshly brewed or tapped beverages, as it implies the drinker is experiencing the full flavor and freshness of the beverage, while also acknowledging the completion of a single serving.
Overall, "drank one draft" is a concise expression used to signify the act of consuming an entire serving of a beverage drawn from a tap, typically an alcoholic one, usually without leaving any leftover.
