red cunt hair
- (slang, vulgar) An extremely small measurement.
1983, Michaelis, David, The best of friends: profiles of extraordinary friendships, Morrow, ISBN 0688015581, retrieved 2009-03-02, page 231:
- A mortar round came in and missed you by an R.C.H. [an R.C.H. being survivors' lingo for something very thin—a Red Cunt Hair] and that sucker missed you by one of those.
- Hair's breadth Wikipedia English