(at one’s) wit`s end
To not know what to do.I was at my wit`s end trying to decide what to wear to the party.
Without rhyme or reason
Without purpose or reason.Without rhyme or reason the two men started arguing in the bus.
Without question
Absolutely, certainly.Without question, the boy was the fastest runner on the team.
Without further ado
Without further talk.Without further ado they ended the meeting.
Without fail
Absolutely, for certain.The postman comes about noon everyday without fail.
Without batting an eye
Casually, without showing any response.The criminal kept changing his story without batting an eye.
What`s up?
What is happening?, What is wrong?."What`s up," the man said as he entered the room.
What`s the big idea?
Why did you do that?, What are you doing?."What`s the big idea? Why are you using my bicycle?"
Well and good
Good, satisfactory.It is well and good that the employee will go and talk to his supervisor about the problem.
Without a hitch
With no problems.We were able to finish everything without a hitch.