Solution:

Ball in your court

Solution:

Once upon a time

Solution:

To be or not to be

Solution:

Up to a point

Solution:

Like there is no tomorrow.

Solution:

I understand

Solution:

Flat Tyre

Solution:

When we read the first brain bat upwards, we conclude the meaning to be 'Slow Down'.
In the second brain bat, when we read it downwards, we can conclude it to be 'Give Up'

Solution:

end up behind bars

Check that the word "END" is spelled in an upward direction behind three occurrences of the word "BAR".

Solution:

Mixing business with pleasure.(PbLuEsAiSnUeRsEs)