American

something that you say when you think an idea will not be successful.

He sent me a movie script but it'll never fly - it's just too unbelievable.

• like a bat out of hell
• like a blue-arsed fly
• like a bolt from the blue
• like a breath of fresh air
• like a bull at a gate
• like a bump on a log
• like a dose of salts
• like a dream
• like a headless chicken
• like a lamb
• like a lamb to the slaughter
• like a lost soul
• like a man possessed
• like a million dollars
• like a shag on a rock
• like a shot
• like a ton of bricks
• like a woman possessed
• like blue blazes
• like clockwork
• like crazy
• like death
• like death warmed up
• like gangbusters
• like gold dust