Need a reason not to plagiarize? Plagiarized writing tend to be painfully obvious to your professors and others who read your work. And it’s this easy to get caught:
Faculty members can search the Internet for specific suspicious phrases in a paper. If you found the source, so can they. It can be as easy as a Google search.
There are a number of online services that scan papers and examine them for plagiarism (including close paraphrasing).
Faculty will often be more understanding about deadlines than you might expect. It’s better to request an extension or to take a lower grade than to face the consequences of academic dishonesty.