The Rep rho Betas were the Sophomore fraternity and were the real demons of the college.
"At Good Old Siwash"
George Fitch
There were seven Rep rho Betas on seven moth-eaten ponies which they had dug up from goodness knows where.
"At Good Old Siwash"
George Fitch
The X is the Greek letter Chi and is equivalent to the English letters "ch"; the P is called rho and is the same as the letter "r;" they thus represent the first three letters of the word Christ.
"The American Church Dictionary and Cyclopedia"
William James Miller