to eat up; to eat (something), often completely / all of it
No sirve de mucho comerse el teclado.
It's not much use eating the keyboard.
Ella le vio comerse un sándwich.
She saw him eating a sandwich.
Esta sopa está demasiado salada para comerse.
This soup is too salty to eat.
A ella le gusta comerse el coco.
She likes to overthink things.
Y entonces comenzaron a comerse unos a otros.
And then they started eating each other.
Hay que comerse todo el plato de comida.
You have to eat the whole plate of food.
— El experimento (2001)
Supongo que Howl no querrá comerse el corazón de una vieja.
I suppose Howl wouldn't want to eat an old woman's heart.
— El castillo ambulante (2004)