| Idiom | Meaning | Example | 
| lose your marbles | 
lose control of your mind, lose it
 | 
When people grow old, do they lose their marbles?
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| lose your mind | 
lose control of your mind, go out of your mind
 | 
If you continue to use drugs, you'll lose your mind.
 | 
| lose your shirt | 
lose most of the money you invested
 | 
He invested in condominiums and nearly lost his shirt.
 | 
| lose your temper | 
become angry, get mad
 | 
When you lose your temper, the children become frightened.
 | 
| lose your tongue | 
be unable to think what to say, cat got your tongue, mind goesblank
 | 
It's embarrassing to lose your tongue when you're standing in front of an audience.
 | 
| lose your touch | 
lose some of your skill, lose it
 | 
"I'm losing my touch," he said, looking at his drawing.
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| losing it | 
losing the ability to think or remember, not sharp
 | 
I think I'm losing it. I can't add or multiply without a calculator.
 | 
| losing streak | 
losing game after game, losing a series of games
 | 
The Jays are on a losing streak. They've lost four games straight.
 | 
| loss leader | 
a low-priced item to bring customers to a store, bogof
 | 
The loss leader at SuperStore is a package of coffee for 99¢.
 | 
| lost cause | 
(See a lost cause)
 | 
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