I'm trying to come up with the criteria for a "giant bouzouki"...I'm thinking 24"+ scale length, and 5 courses, but post pics of what you consider a monster bouzouki!
I'll start. This is my 5 course Andy Manson zouk built earlier this year. It's a 27" scale length with Indian rosewood back and sides, spruce top, and mahogany neck. I tune it to DADAD and use it mostly for backing trad. Irish music.