Refers to the back of the neck, often used in specific contexts.
Me duele el descocote después de tantas horas al sol.
My nape hurts after so many hours in the sun.
La señora García tiene un collar que le cae delicadamente sobre el descocote, dándole un aire elegante.
Mrs. García has a necklace that delicately falls over her nape, giving her an elegant air.