PFC noun a private fucking citizen US What a private first class became upon his discharge from duty in Vietnam.
Kalane smiled. “They don’t let pfc’s in here, Lieutenant.” Tyson said, “They do if pfc means private fucking civilian.” — Nelson DeMille, Word ofHonor, p. 356, 1985
— Gregory Clark, WordsoftheVietnamWar, p. 411, 1990