British, informal, American, informal, Australian, informal

if someone wouldn't say boo to a goose, they are shy and nervous.

She wouldn't say boo to a goose, so I don't think she's cut out for a career in the police.

I remember her as a quiet little girl who wouldn't say boo.

• your finger on the pulse of
• your finger on the pulse of something
• your glad rags
• your goods and chattels
• Your guess is as good as mine.
• your guess is as good as mine
• your hands are tied
• your head off
• your heart bleeds
• your heart bleeds for
• your heart bleeds for someone
• your heart goes out to
• your heart goes out to someone
• your heart isn't in it
• your heart out
• your heart sinks
• your heart skips a beat
• your jaw drops
• your John Hancock
• your life is in hands
• your life is in someone's hands
• your lips are sealed
• your lord and master
• Your luck's in!
• your meat and two veg