Definition of "crup"

crup¹

/kɹʌp/

noun
plural crups
1. Alternative form of croup (the rump of a horse)
  Quotations
  The part immediately above the tail (i.e., the haunches) is the crup, and about 4 to 5 inches above the crup the butt is separated from the hide.
  1904, The Leather Manufacturer - Volumes 15-16, page 105

crup²

/kɹʌp/

adjective
comparative more crup, superlative most crup
1. Short; brittle (both literally and figuratively).
  Quotations
  Why now so angry, trow ye? What's the matter, That our Sir James is grown so crup and tatter?
  1664, Thomas St Nicholas, Upon Mr. Benchkin, The Curate of Ash, His Presentment of Me to the Consistory Court at Canterbury For Helping to Lay my Poor Old Nurse, the Widow Solly, In her Grave As Soon as she was Brouth Thither and The Coverings, Without Noise or Disturbance, Taken Off
  […] and care must be had to rost him so leasurely, that he neither burn, nor continue raw: for when the skin seems crup, it is a sign all is rosted, and the Polenta is taken away.
  1669, John Baptista Porta, Natural Magick, page 322
  He was tedious crup with me.
  1790, Francis Grose, Letters