How Do You Spell HADST WHACK?
Pronunciation: [hˈadst wˈak] (IPA) 
The word "hadst whack" is an archaic form of the phrase "have whacked" that was used in Old English. The spelling of the word can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The first word "hadst" is pronounced as /hædst/, with the "h" being silent and a short "a" sound followed by a "d" and "st". The second word "whack" is pronounced as /wæk/, with a short "a" sound and a "k" sound at the end. Together, "hadst whack" would have been pronounced as /hædst wæk/ in Old English.
