be a dead cert

be a dead cert

slang To be likely to do a certain thing or to succeed in a particular area. Primarily heard in UK, Australia. Sally is the most qualified candidate by far, so she's a dead cert for the promotion.
See also: cert, dead
References in periodicals archive ?
Joe's single, The Climb, was thought to be a dead cert until a Facebook campaign urged people to download Killing in the Name, last in the charts in 1992.