A term for a small breasted girl usually under the age of 15 but always younger than 18. The term describes a certain type of Jailbait. Originates on the website "Jailbait Gallery" for the well known member Caffy, who enjoyed pictures of these girls so openly, his name became the standard of describing them.
"Look at that hot girl over there. She's got mosquito bites."
"Haha, yeah, she's totally Caffy bait."
"I made out with this girl yesterday, but she was so flat."
"Yeah, she was really Caffy bait."