It appears to be a coatrack or armor stand. Only marking is LEGO inside the 2 studs on the arms. The bottom is completely blank which is uncharacteristic of a LEGO piece. It is 3 bricks tall with 2 arms with studs at 2 bricks high and a single stud on top. On a 2x2 base.
That would be part 4289 Boat Mast 2 x 2 x 3 Inclined with Stud on Top and Two Sides
As the name implies, it is typically use for a boat mast on modern boat models.
It only ever came in black in one set, 4669 Turbo-Charged Police Boat.