Changes the default hitsound to "Some...", and the default killsound to "-BODY ONCE TOLD ME". Hit a person twice and manage to kill them, and you get the full sound. You get the idea.
Default Hitsounds: the standard All-Star meme phrase.
"Squasher" hitsound: Nathan Vetterlein (the Scout VA)'s version.
Place the "sound" folder into steam/steamapps/common/team fortress 2/tf/custom/customstuff.