verb

• (obsolete, intransitive) To thrust.
  "I'll potch at him some way, / Or wrath or craft may get him."
• (obsolete, transitive) To trample.
  "Afterwards, the second pasture should be treated in the same manner, and the rest in course, feeding the wettest pasture after the driest, that the soil may be less potched."

noun

• (chiefly Australia, mineralogy, gemmology) A type of rough opal without colour, and therefore not worth selling.
  "1982, Gemmological Association of Great Britain, The Journal of Gemmology, Volume 18, page 432, Discusses the difference between potch opal and common opal. The terms are often used synonymously, but this writer shows that potch is found only in association with precious opal and differs from common opal in its structure quite substantially."

verb

• (transitive) To bleach rags in paper-making.

name

• (informal) Potchefstroom (South African city).