Dissing Hendos, using the L word, and praising Margaret Thatcher are just some of the things that can really get the goat of Sheffielders.
Our sister website WOW247 has published a list of 19 guaranteed ways to annoy someone from Sheffield.
Other things on the list of things that rile Sheffielders include a lack of good manners, and disrespecting the city's proud musical heritage.
Have you got any more good suggestions for this list? Have your say in the Comments section below.