And for Cassio, let me be his undertaker: you shall hear more by midnight.
– William Shakespeare
Othello, Act 4, Scene 1. Iago promises Othello that he will murder Cassio that very night. An undertaker is someone who takes care of the dead and buries them. But Iago uses it with a more sinister meaning in mind – to despatch the man that Othello believes Desdemona has been cheating with.