gips

1. (medical) cast; plaster cast
   Ruka mu je već tri nedelje u gipsu. — His arm has been in a cast for three weeks.
   Sutra mi skidaju gips. — They're taking my cast off tomorrow.
2. gypsum; plaster
   Majstor je zatvorio rupe na zidu gipsom. — The workman filled the holes in the wall with plaster.

Drywall is called gips-karton or knauf in Serbian.