English Idioms with word flat

Idiom	Meaning	Sentence
... and that’s flat !	inf. and that is my last word	You will go with us for the weekend - and that's flat!
fall flat	(a plan/project etc.) fail to develop	We had plans to go to Greece, but they fell flat when my daughter fell ill.
a flat battery	a battery that must be re-charged	No wonder the engine can't start. You've got a flat battery.
flat out	with all one’s energy	I’ve been working flat out all day trying to get the report finished.
a flat tyre	a tyre with no air in it, or not enough	Sorry we’re late. We had a flat tyre on the way here.
in two minutes etc. flat	inf. in no more than two minutes etc.	When I told the children we were going to the park, they were ready in ten seconds flat.
knock someone flat	shock/stun someone with a mental blow	The horrible news of the plane crash knocked us flat.
tell someone flat	tell someone in a very positive and definite manner	I told him flat that I had no intention of lending him any money.
a flat denial / refusal	a definite denial / refusal	They made us a poor offer so we had to give them a flat refusal.