gyprock

Blend of gypsum +‎ rock

gyprock (countable and uncountable, plural gyprocks)

1. Rock rich in gypsum; gypsic soil.
   • 1979, Richard Vincent Dietrich, Brian J. Skinner, Rocks and rock minerals, page 215:

     Some high quality white or variously tinted fine-grained gyprocks, usually referred to as alabaster, were used as interior facing stones and for small statues and carved decorative objects found in Egyptian pyramids

   • 2006, R. Lal, Encyclopedia of soil science 1‎, page 796:

     The world distribution of gyprock outcrops and the solubility of gypsum restrict the extensive occurrence of gypsic soils to the dry regions

2. Drywall.
   • 2012, Richard Harris, Building a Market: The Rise of the Home Improvement Industry‎, page 55:

     Cinder blocks were more durable, however, and soon gypsum was redirected for “gyprock” drywall, a wallboard...

• (drywall): Thesaurus:drywall

gyprock (third-person singular simple present gyprocks, present participle gyprocking, simple past and past participle gyprocked)

1. (construction, transitive) To drywall.