| Idiom | Meaning | Example | 
| a babe in arms | 
a baby, a child who is still wet behind the ears
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Dar was just a babe in arms when we emigrated to Canada.
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| a babe in the woods | 
a defenseless person; a naive, young person
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He's just a babe in the woods. He needs someone to protect him.
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| a bad taste in my mouth | 
a feeling that something  is false or unfair, a feeling of ill will
 | 
I left the meeting with a bad   taste in my mouth. There was a lot of dishonesty in the room.
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| a bad time | 
a lot of teasing, a rough time
 | 
The class gave him a bad time about his pink shorts.
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| a ball-park figure | 
a number that is near the total; approximate figure
 | 
Fifty is a ball-park figure. It's close to our class size.
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| a bar fly | 
a person who often goes to bars or lounges
 | 
Every evening Penny goes to Lucifer's. She's quite a bar fly.
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| a bar star | 
a girl who goes to bars to drink and find friends
 | 
Lola was known as a bar star at   Pinky's Lounge.
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| a bare-faced lie | 
a deliberate lie, a planned lie
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His statement to the police was false - a bare-faced lie.
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| a barnburner | 
an exciting game, a cliff-hanger
 | 
When the Flames play the Oilers it's a barnburner - a great game.
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| a barrel of laughs | 
a lot of fun, a person who makes you laugh
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Let's invite Chang to our party. He's a barrel of laughs.
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