Gash
Gash may refer to:

Places
Gash, Hormozgan, a village in Hormozgan Province, Iran
Gash, Razavi Khorasan, a village in Razavi Khorasan Province, Iran
Gash River or Mareb River, flowing out of northern Ethiopia

People
Jim Gash (born 1967), president of Pepperdine University
Lauren Beth Gash (born 1960), American politician and lawyer
Michael Gash (born 1986), English footballer

Music
Gash (Foetus album), 1995
Gash (EP), an EP by Pram
"The Gash", a song by The Flaming Lips from The Soft Bulletin

Slang
Wound, a type of injury
Colloquial term for the vulva
British military slang (specifically from the Royal Navy and Royal Marines) for rubbish (garbage), or for something that is considered useless, broken or otherwise of little value

Other uses
Gash (TV series), a 2003 British series presented by Armando Iannucci
Gash Bell, a main character of the anime and manga series Zatch Bell!