Um, that's not what we say here in Australia. A shrimp refers to a tiny person. But it's a common misconception that's to an advertising campaigned thirty or so years ago that was aimed at Americans.
Admittedly, this is a pretty innocent misconception. It doesn't harm anyone, really. However, other stereotypes do, and when these are perpetuating into writing, you can end up with harmful representation.
I see a lot of talk about it online, and I know as a cis white female, I'm pretty clueless on what others face and it's my responsibility to research for my writing to try make sure I don't have harmful rep in my writing.
I really don't want to give examples, as I don't want to perpetuate any, so I'll only talk about things I have personally experienced. And the examples aren't particularly harmful, but were at times annoying. They are more to exemplify how stereotyping can get things wrong.
- White collar workers in Australia vote Liberal: My father was a white collar worker, who was also a member of the labour party at one time.
- PR deals with the fluffy stuff: Problem solving is one of my strongest attributes, often because I think outside the square with creative solutions, but also because I see patterns.
- Front-row Rugby League players are meat-heads: My eldest son was simultaneously a representative level front-row rugby league player and dux of his primary school (smartest in his grade) and is now studying engineering.
- People with OCD are neat-freaks: I am one of the messiest people ever. That's because OCD is way more complex, and present in more ways, than people think.
- People with epilepsy fall down and thrash around: That's a way to describe someone having a grand mal seizure. My son has complex-partial epilepsy, and his seizure involve him looking vague, having automation, and not comprehending what is happening around him. There are more than 40 different types of epilepsy.
- The man is the breadwinner of the house: My husband has been the primary carer for our children for about three-quarters of their lives, while I have been the main income earner for more than half of my husband and my married life.