Gash v. t. : To make a gash, or long, deep incision in; -- applied chiefly to incisions in flesh.

Gash n. : A deep and long cut; an incision of considerable length and depth, particularly in flesh.

Example:
How to repair a Gash in the wall?

Taxonomy
deep cut, Synonyms, band, Foetus, corte, Houghton Mifflin Company, Dictionary, Thesaurus, Translations, Greek, incise, slit, Pram, Rock Band, Unanswered questions, Português, ferir, 中文.

Defination from the web:
gash tr.v. , gashed , gashing , gashes . To make a long deep cut in; slash deeply. n. A long deep cut ... Gash River, also known as the Mareb River, flowing out of northern Ethiopia. This disambiguation page lists articles associated with the same title. ...