Nope, nope, and triple-nope (or, at least not as a general rule). Copying content from another website exactly is not only plagiarism but will be flagged by Google’s crawlers as duplicate content, harming the SEO value of your website.
If you really do want to copy content from another website (say a blog or article), you need written consent from that website owner. You should also link to the original article. Though, if we’re being honest, we’d recommend staying clear of that.