👉 The term "tacker" is a slang term used in American football. It refers to a player who plays as a defensive back, usually at fullback or strong safety (also known as a linebacker). Tackles are typically made by blocking and protecting the quarterback from passing attempts. The term is often associated with the New England Patriots of the National Football League (NFL) because they have a tradition of using tacks to stop running backs and receivers in their defensive backfield.