Boat tail

Boat tail may refer to:


 * Stern, the rearmost part of a boat or ship
 * Trailer tail or boat tail, an aerodynamic device affixed to semi-trailer trucks to improve fuel economy
 * Boat tail (ballistics), a tapered base on a non-powered projectile designed to reduce drag
 * Rolls-Royce Boat Tail, a car made by BMW Rolls-Royce to resurging the old boat tail character