1) Do you say "I am looking for a business casual suit" or "A casual business suit"? Or still/yet(Do you say "or still" or "or yet"?) "A business, casual suit"? "business casual suit" may sound strange, but it's real! I've never heard the term "casual business suit" used. A business casual suit is a less formal suit than a business suit. Which type of suit you wear depends on the formality of your workplace. 2) I saw (or I've seen???) a video titled "ASMR aviation sleep destination" ... What does "aviation sleep destination" mean? "I saw" - probably a recent event. "I've seen" - something I have done at sometime int the past. "Aviation sleep destination" -Hmm, I'm guessing, but I think it means you sleep on the plane (So maybe nice seats you can make into beds?) then wake up at your destination. 3) Do you say "I will try on a shirt on you" or "I will try a shirt on you"? "I will try a shirt on you." is correct.

3) I will try a shirt on you

1) "casual business suit" .Since "business suit" is the noun that you're describing, you should put casual in the front of it. 2)sorry, idk