The term 'Pick Pockets' refers to a type of criminal activity in which a person steals items from another person's pocket or bag without them noticing. The two words that can be used to describe this activity are 'ROB' and 'STEAL', both of which have 3 and 5 letters respectively. This type of crime is often associated with crowded areas, such as markets or festivals, where it is easier for the thief to go unnoticed.