Best definition
Whomst’d’ve’ly’yaint’nt’ed’ies’s’y’es’ll
The superior form of whomst’dve.
With this new knowledge you can impress your friends at a party or impress loved ones

and make them inferior to you.

Guy 1: Whomst’d’ve’ly’yaint’nt’ed’ies’s’y’es’ll took my weed brownies?!

Guy 2: Looks like you have bamboozled me again.