A frisk is the pay down of what

If the police reasonably suspect that the suspect is armed and dangerous, the police may frisk the suspect, meaning that the police will give a quick pat-down of the suspect's outer clothing. The frisk is also called a Terry Stop, derived from the Supreme Court case Terry v.

Police officers are allowed to stop someone they reasonably suspect of criminal activity. They may follow up the stop with a frisk (or pat-down) if they have reason to suspect that the person is armed and dangerous. A frisk in this context is supposed to be a limited search of the person's outer clothing-for weapons.