'Whomst'd've' is the dominant word for: Who, Whom, and Whomst.
This word is used for did, and have.
This word is used rarely, due to how
fancy many perceive this
work to be, and usually side with Who, or Whom.
The most common use of 'Whomst'd've', is found in the most dominant
culture, and most recent culture, the 'Memers'. The Memers were also the ones to invent this word.
Guy 1 (Presumably a Memer) : "Yo, do you Whomst'd've my other
pencil?"
Guy 2 (Normie): "What? That's not even a word."
Guy 1: "Ye"
Guy 2: "No"
Guy 1: "Let me restate that you non-intellectual; Excuse me sir, do you have the
knowledge of whom did have my previous
pencil?"
Guy 2: "Can you stop?"
Guy 1: "People like you need to know true culture."