“I think we need to put a stick in the mud and tell them that anything else will cost more.”
(I assume he meant, ‘line in the sand.’)
“We’ll go over it with a fine tooth and comb.”
(I assume she meant, ‘fine-tooth comb.’)
These are reasons 4,213 and 4,214 not to use clichés. If you get them wrong, you sound ridiculous.