Okay kiddo, stop-and-frisk is when police officers stop people on the street and search them for weapons or other things that they think might be illegal. In New York City, there was a policy where police officers were allowed to stop and frisk people without a warrant or good reason. The idea behind this policy was to reduce crime and keep people safe.
However, some people thought that it was unfair because black and Latino people were stopped and frisked much more often than white people. Some people also said that the policy violated their rights because they were being searched without a good reason.
Eventually, a court ruled that the stop-and-frisk policy in New York City was unconstitutional because it discriminated against people of color. Since then, the policy has been changed and police officers now need a good reason to stop and search someone.
In summary, stop-and-frisk used to be a policy in New York City where police officers would randomly search people for weapons or other illegal items. However, this policy was found to be unfair and unconstitutional because it targeted people of color and violated people's rights.