The spelling of the phrase "doest lunch" is incorrect. In modern English, the word "doest" is obsolete and is not used in everyday conversation or writing. The correct spelling would be "does lunch", with the vowels pronounced as /ʌ/ and /ʌ/ respectively. "Does" is the third person singular present tense of the verb "to do", and "lunch" refers to a midday meal. Therefore, the correct phrase is "he/she/it does lunch" or "they do lunch".
"Doest lunch" is an archaic or obsolete phrase that does not have a widely recognized or specific dictionary definition. It seems to be a combination of two words: "doest," which is an old conjugation of the verb "do" in the second person singular form, and "lunch," which refers to a midday meal.
"Doest" is an inflection of the verb "do" used in Early Modern English during the 16th and 17th centuries. It is the second person singular form, similar to the modern "do you." However, it is no longer in common usage and has been replaced by "do" or "does" in modern English.
"Lunch," on the other hand, refers to a meal traditionally taken in the middle of the day, typically between breakfast and dinner. It is often lighter and less formal than dinner and may include a variety of foods such as sandwiches, salads, or soups.
The phrase "doest lunch" could potentially be interpreted as an outdated way of asking someone if they have or intend to have lunch soon. However, this would not be a standard or recognized phrase in contemporary English usage.