murder

get away with murder succeed in doing whatever you choose without being punished or suffering any disadvantage. informal

murder will out murder cannot remain undetected.

☞ This expression was used by Chaucer in The Prioress's Tale: 'Mordre wol out, certeyn, it wol nat faille'.

scream (or yell) blue murder make an extravagant and noisy protest. informal

☞ A North American variant of this phrase is scream bloody murder.

1995Iain BanksWhit I was now left with the ticklish problem of how to let my great-aunt know there was somebody there in the room with her without…causing her to scream blue murder.