rch 

The smallest unit of measurement practically possible: A Red Cunt Hair.

rch by Anonymous December 15, 2002

RCH 

30 microns. Measured on a comparator by a physical scientist on his secretary's red cunt hair at the Defense Mapping Agency's Erskine Hall, Bethesda, MD sometime around 1980. No Shit. Your tax dollars at work.

"That RCH was yummy!" said Roy as he pulled it from his teeth.

RCH by Joe Schmuckatella December 31, 2008

rch 

a very FINE measurement.

Go gets my hammer sos wes can move dis an rch.

rch by mushim October 24, 2003

rch 

A standard of measurement, the basis of the nano rch and the pico rch.

OK, Lem, we gotta move this mill just an RCH, so go easy with the hammer.

rch by Sneaky Snyde April 30, 2005

rch 

dental floss after a very Fine meal.

rch by mushim October 24, 2003

rch 

Royal Cunt Hair
The idea that the pubis mons of royalty are as fine as can be.

"I was playing table shuffleboard at Michaels last night and JUST missed the other teams puck by an RCH!"

"So you had to buy the beer?"

rch by Grugster June 11, 2007

rch 

short for reach
means come meet us

rch downtown

rch my house
yo do you wanna rch

rch by y’all.dumb June 7, 2018