What is the meaning of Gash?

A deep cut.

A vulva.

A woman.

To make a deep, long cut; to slash.

Rubbish, particularly on board a ship or aircraft.

Nonsense.

Something low quality.

Unused film or sound during film editing.

Poor-quality beer, usually watered down.

Of poor quality; makeshift; improvised; temporary; substituted.

Spare, extra.

ghastly; hideous

Source: wiktionary.org