Welp, some moron clogged the toilet. As long as a strange object was not put down the drain, there might be hope. Do not call a plumber just yet, and you might not need an annoying plumbing snake
you might be tempted to go and get an expensive bottle of drain cleaner. Before you do, take a bottle of dishsoap and dump that sucker into the toilet. If it is just a toilet paper clog, the soap might be enough to loosen the clog. Let it soak for a half hour, flush, then cross your fingers. The clog might free up and save you the 8$ bottle of top of the line drain cleaner or the more expensive plumber.