This is the 9822nd most frequent Spanish word.
bajón
A sudden drop, decline, or emotional slump.
Here, 'bajón' is used metaphorically to describe a sudden decrease in energy.
Ayer tuve un bajón de energía después del almuerzo.
Yesterday I experienced a drop in energy after lunch.
In this sentence, 'bajón' refers to a decline in morale or spirits.
El equipo sufrió un bajón anímico tras la derrota.
The team experienced an emotional slump after the loss.
Here, 'bajón' signifies a sudden state of depression or sadness.