| 1 | Narrow-minded- Not willing to accept the ideas of others |
| 2 | Mumbo Jumbo- Nonsense or meaningless speech |
| 3 | Mum’s the word- To keep quiet, To say nothing |
| 4 | More or less- Approximately, almost, somewhat, to a certain degree |
| 5 | Milk and water- Weak |
| 6 | Might and main- With all enthusiasm |
| 7 | Method to my madness- Strange or crazy actions that appear meaningless but in the end are done for a good reason |
| 8 | Make no bones about- To state a fact so there are no doubts or objections |
| 9 | Loose cannon- Someone who is unpredictable and can cause damage if not kept in check |
| 10 | Long in the tooth- Old people (or horses) |
| 11 | Lock and key- In safe place |
| 12 | Loaves and fish- Material interests |
| 13 | Live-wire- Energetic |
| 14 | Little by little- Gradually, slowly (also: step by step) |
| 15 | Liquor someone up- To get someone drunk |
| 16 | Like a chicken and its head cut off- To act in a frenzied manner |
| 17 | Life and soul- Main support |
| 18 | Level playing field- A fair competition where no side has an advantage |
| 19 | Let the cat out of the bag- To share a secret that wasn’t suppose to be shared |
| 20 | Let along- and certainly not (also: not to mention, to say nothing of) |
| 21 | Length and breadth- All over |
| 22 | Lend me your ear- To politely ask for someone’s full attention |
| 23 | Leave no stone unturned- Make all possible efforts |
| 24 | Latin and Greek- Unable to understand |
| 25 | Last straw- The final event in a series of unacceptable actions |
| 26 | Last but not least- An introduction phrase to let the audience know that the last person mentioned is also very important |
| 27 | Know the ropes- To understand the details |
| 28 | Knock on Wood- Knuckle tapping on wood in order to avoid some bad luck |
| 29 | Kitty-corner- Diagonally across. Sometimes called Catty- Corner as well |
| 30 | Kith and kin- Blood relatives |
| 31 | Kick the bucket- Die |
| 32 | Keep your chin up- To remain joyful in a tough situation |
| 33 | Keep body and soul together- To earn a sufficient amount of money in order to keep yourself alive |
| 34 | Keep an eye on him- You should carefully watch him. Keep an eye on |
| 35 | Joshing me- Tricking me |
| 36 | Jaywalk- Crossing the street (from the middle) without using the crosswalk |
| 37 | Ivy league- Since 1954 the Ivy league has been the following universities: Columbia, Brown, Cornell |
| 38 | Ivory tower- Imaginary world |
| 39 | It’s a small world- You frequently see the same people in different places |
| 40 | It takes two to tango- A two person conflict where both people are at fault |
| 41 | It figures- It seems likely, reasonable, or typical |
| 42 | It anyone’s call- A competition where the outcome is difficult to judge or predict |
| 43 | Intents and purposes- Practically |
| 44 | Inside out- With the inside facing the outside |
| 45 | Ins and outs- Full detail |
| 46 | In your face- An aggressive and bold confrontation |
| 47 | In vain- Useless, without the desired result |
| 48 | In touch- Having contact |
| 49 | In time to- Before the time necessary to do something |
| 50 | In the worst way- Very much, greatly |
