Never heard "deffo" before- is that actually a thing? Pretty sure I've only heard "za" in TV shows and movies (did the Ninja Turtles use that term?) but never in real life.
"Jelly Belly chocolate flavored seltzer water"? As much as I'd like to sample a beverage that sounds like a ####ing Limp Bizkit album title, I don't drink anything with carbonation due to my acid reflux.