In some studios, people might call designs even designers by nasty names. This is often done to attempt to free people to provide deeply honest feedback about design, train designers to have “thick skin,” impervious but open to negative feedback. But it can be highly discouraging to many novice designers, making them question their abilities.
I feel like the approach of being very rude and honest to designers can work in someways but it depends. People use critique as a way to improve themselves, but some people are more sensitive than others. Some designers may give up after being called nasty names because they're too hurt. It's almost like survival of the fittest but it's who has thicker skin and is willing to take negative feedback. Being able to take negative feedback is important though, because it will happen whether you like it or not, in all aspects of life.