laughing stock 
noun
A person subjected to general mockery or ridicule: she was the laughing stock of her class...
- We knew we were in for a lashing from the press because to lose to the USA made us the laughing stocks of the game and really it was dismal.
- We are the laughing stock of Europe with our ridiculously high prices for everything and our stupid infantile government.
- Both are totally discredited laughing stocks that add to the variety of political life.
Synonyms
figure of fun, object of ridicule, dupe, butt, fool, joke, standing joke, everybody's fool, stooge;
fair game, everybody's target, victim, Aunt Sally;
exhibition, spectacle
informal fall guy
British informal goat