snapper
n.— «Police said a correctional officer overheard Campbell say to Morrissey, “At least I’m not a snapper like you.” Officials at the prison said that in Vermont prisons “snapper” is a derogatory term for an inmate who has either been accused of or convicted of sexual assault. At the time of the alleged assault, Morrissey was being held on aggravated sexual assault charges.» —“Man denies inmate assault” by Josh O’Gorman Rutland Herald (Vermont) Feb. 19, 2008. (source: Double-Tongued Dictionary)