| A | B |
|---|
| Achilles' Heel | River Styx |
| Achilles' Heel | area of vulnerability |
| Pound of Flesh | Shylock's demand if the contract failed |
| Pound of Flesh | insistence on repayment |
| Sacred Cow | Hinduism belief about something which must be honored or protected |
| Sacred Cow | cannot be interfered with |
| Crossing the Rubicon | Julius Caesar |
| Crossing the Rubicon | an irreversible step |
| Pearls before Swine | comment from Sermon on the Mount |
| Pearls before Swine | value that isn't appreciated |
| Once in a Blue Moon | happens approximately every three years |
| Once in a Blue Moon | something that occurs very rarely |
| Mrs. Grundy | conventional prudishness |
| Mrs. Grundy | Speed the Plough |
| Crocodile Tears | this happened before devouring prey |
| Crocodile Tears | false sympathy |
| Sirens | mythological sea creatures who lured sailors to their death |
| Sirens | luring to destruction |
| Read the Riot Act | English Common Law |
| Read the Riot Act | Stern Warning |
