Firing on all cylinders
To be working and making every possible effort.We were firing on all cylinders when we began work on the new project.
(be) fired up about (something)
To feel a very strong emotion about something.The employees were fired up when they heard that they would have a decrease in their salary.
Fire away at (someone or something)
To shoot at someone or something, to ask many questions.The students began to fire away at the speaker after he finished his speech.
Fire a gun
To shoot a gun.I fired a gun for the first time at my uncle's farm.
Finger in the pie
A part ownership of something or responsibility for something.My uncle has his finger in the pie of many small companies in our town.
A fish out of water
Someone who does not fit in.The man was like a fish out of water at the expensive restaurant.
Fall short of (one`s expectations)
To be not as good as one expected.The new movie fell short of people's expectations and attendance is very low.
Fall over oneself to (do something)
To be extremely eager to do something or please someone.The couple fell over themselves in their effort to please their host.
Fall asleep
To go to sleep.I fell asleep as soon as I went to bed.
Fall apart at the seams
To separate at the seams (for material that is sewn together), to fall apart.My backpack was falling apart at the seams so I bought a new one.