If you don’t have a toilet plunger, and you’ve clogged it up, pour in a bit of dish soap, and some hot water (the hotter the better). Let stand for 15 minutes, and flush. Learned this when immediately upon arriving at our hotel, my 8 year old clogged up our toilet and I googled. Found this gem, realized I’d packed a tiny travel bottle of dish soap, warmed water up in the microwave and lo and behold, it worked.
I still use it sometimes at home when I don’t wanna be grossed out by plunging. Yes, my child has a tendency to clog toilets. So there ya go.