okoshi's meanings: http://jisho.org/words?jap=okoshi&eng=&dict=edict

If you mean "Okoshi"(お腰:おこし）, it means "hip" in japanese. *I have commented this answer before Anadi explained the situation in the shop,so I misunderstood the word. After I understood what Anadi wanted to mention, I now know the meaning of the sentense should be: "Okoshui Kudasai mashite arigato gozaimasu! " お越しくださいまして、ありがとうございます（Or ありがとうございました） ＝Thank you for coming to my(or our, or this) shop

Correct Japanese is "Okoshi kudasai mashite arigato gozaimasu!(お越しくださいましてありがとうございます!)" It means "Thank you very much for coming to our shop!".

it helps.

I was watching a video about a sushi resturant called "YO! Sushi" and at the end of the video they said: "Okoshui Kudasai mashite arigato gozaimasu! " is it like; "thanks for visiting us"?? http://www.youtube.com/watch?v=DdpSp9JmLjQ&NR=1