Snitch, to give information to the police, to turn approver.
"Now, I'm not going to snitch on my mates," said McCarty decidedly.
The computers I love are being co-opted, used to spy on us, control us, snitch on us.
A promise is a promise, especially to a small boy who scorns to "snitch."
Will you promise not to snitch if I tell you how to stop it, even if you don't go there ...