mean no offense
To not imply or intend any offensive meaning in what one says or does. Usually used in the past tense. I truly meant no offense by what I said—I was just making a literal observation about your clothes, that's all! I'm sure you meant no offense, but just consider for a moment how someone might interpret what you said.
mean no offense
not to intend to offend. (See also take no offense.) I'm really sorry. I meant no offense. It was simply a slip of the tongue. He meant no offense by it.