grammar and spoken drama

hi, i don't know if this is the right place to ask, adms feel free to delete this post if it's not proper!! i have two questions...difference between 遍and次　? and also, the other day I was sweaping the floor in my office, my chinese boss comes in and tells me xing1(xin1?)ku3...what does it mean? I couldn't find it anywhere!

thanx a lot ^-^