| Idiom | Meaning | Example | 
| Murphy's Law | 
"Anything that can go wrong will go wrong." it never fails
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Have you planned for failure? Remember, Murphy's Law applies to all projects.
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| muscle in | 
force yourself between two people
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He didn't want to go to the end of the line, so he tried to muscle in.
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| music to my ears | 
good news, a message that makes me happy
 | 
When she called my name, it was music to my ears.
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| musical chairs | 
a game in which each player must find a chair when the music stops
(there are more players than chairs), play musical chairs
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"At my birthday party can we play a game of musical chairs?" "Yes, dear."
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| must | 
(See a must)
 | 
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| my ass | 
I doubt it, that is not true
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"It's our right to own a gun." "My ass! It's a privilege!"
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| my eye | 
I do not believe it, that did not happen
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You ate fifteen blueberry pies? My eye!
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| my old man | 
my husband, my man
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My old man is babysitting while I have a weekend holiday!
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| my old man | 
my father, my dad
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My old man gets mad if I don't come right home from school.
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