R.C.H.

A red cunt hair. Referring to the smallest unit of space, length, width, or height allowable.

I missed that bullseye by an R.C.H..

by Dave December 20, 2002

R.C.H.

how ever in the united kingdom it is a Royal Cunt hair.

As it is the metric system.

therefore it is strictly governed.

your mini cooper i a R.C.H. is out of adjustment.

by Brian Gibbs February 8, 2008

R.C.H.

registered cunt hair

a very small amount of space--larger than a micron--used on film sets
"Move frame left an R.C.H."
"If she just moves an R.C.H. to the right, the shot will be perfect."

by dtwilliams7 July 12, 2008