there's no use trying to 'blag it' when you speak to her, she'll see right through what you say - she's a real clever cracker
person who cuts through the jargon to get to the crux of the message
"there's no use trying to 'blag it' when you speak to her, she'll see right through what you say - she's a real clever cracker" What is the definition of "clever cracker"?