Don't ever put someone's private information on to the internet without their permission. It is immature and potentially dangerous. No matter what they did to you, revenge/pranks aren't going to fix anything. Especially if it's your sister.
The denotation of a word is the definition that you would find in a dictionary. So, the denotation for voracious is: Consuming or eager to consume great amounts of food. -www.thefreedictionary.com-