Matching Pairs AllusionsOnline version Allusions by Cynthia Cox 1 Once in a Blue Moon 2 Sacred Cow 3 Betrayed with a Kiss 4 Pearls Before Swine 5 Gordian Knot 6 Pound of Flesh 7 Sirens 8 Mrs. Grundy 9 Crossing the Rubicon 10 Ivory Tower 11 Read the Riot Act 12 Sound and Fury 13 All That Glitters is not Gold 14 Achilles Heel 15 Crocodile Tears 16 Thirty Pieces of Silver Describes someone's insistence on being paid, even if repayment will destroy the debtor to offer something precious to someone who are unable to appreciate the value of what is given An attitude of narrow-minded prudishness A person who is secluded or protected from the real world and thus out of touch with reality To take an irreversible step, often involving some danger something which appears valuable on the outside may in fact be less than valuable; appearances can be deceptive payment received for an act of treachery refers to a great, tumultuous, and passionate uproar that is actually unimportant or meaningless Something that happens rarely a supposed friend's treachery To issue a stern warning that if unacceptable behavior does not cease, severe consequences will follow. To show false sympathy A vulnerability or point of weakness Anything that tempts someone away from safety and towards a dangerous path Something that cannot be interfered with or harmed in any way Any extremely complex problem