“A logical fallacy is a flaw in reasoning. Logical fallacies are like tricks or illusions of thought, and they’re often very sneakily used by politicians and the media to fool people. Don’t be fooled! This website has been designed to help you identify and call out dodgy logic wherever it may raise its ugly, incoherent head.” (Your Logical Fallacy Is website)
I like this site, and it’s pretty good at describing various logical fallacies. It explains what each fallacy means, as well as gives examples of said fallacy. If you come across any fallacies, be sure to correct them!