- "And didn't I keep the secret about Spivvins — under torture too?"
- ―Eustace Scrubb [src]
Spivvins was a school mate of Eustace at Experiment House around 1942. He may have been a frequent target of bullying at his school.
He apparently had, or was associated with, a secret of some sort, which came to the knowledge of his schoolmate, Eustace Scrubb. The Gang, a group of bullies, once put Eustace under 'torture' to discover the secret. True to his altered character, Eustace did not reveal Spivvin's secret.
It is likely that, whatever the secret was, schoolmate Jill Pole knew of it as well, implying that the two were perhaps friends.