Cut-throat

Among the manufacturers of so-called consumer electronics, there's ruthless, cut-throat competition.

Tom lathered his face and shaved with a cut-throat razor.

As from January 1, 1899, the former cut-throat rivalry between the South Eastern Railway (under Sir Edward Watkin) and the London, Chatham & Dover Railway (led by James Staats Forbes) was composed by a joint management and traffic sharing (S.E.R. 59 per cent. and L.C.D.R. 41 per cent.) under the South Eastern & Chatham Railway Companies Managing Committee, which was established by Act of August 1, 1899.