be a (dead) certCERTAINLY/DEFINITELYBritish EnglishBrE informal to be certain to happen or to succeed 必然发生,确定无疑;必定成功
Put your money on Thorpe to win, he’s a dead cert.
你押索普获胜吧,他准会赢。
Examples from the Corpus
be a (dead) cert• One candidate, the outgoing Taoiseach and the then leader of FineGael, was a cert.• I knew my sons had been saying that of course Mum would cry - it was a dead cert!• No, this was a dead cert.