Refers to a state of being slow or lazy.
La balhurria se apoderó de mí y no pude salir a correr.
Sluggishness took over me, and I couldn't go out for a run.
La balhurria que siente en las mañanas a veces le impide salir de la cama.
The sluggishness he feels in the mornings sometimes prevents him from getting out of bed.