'SOFT SHOE' : Speaking to someone or a speech given in a gentle or conciliatory way.
'YOU COULD CUT IT WITH A KNIFE' : Ih the air is so trick, you could cut it with a knife, it is so humid or muggy. It could aldo mean that there's a lot of tension.
'PEARL OF WISDOM' : A pearl of wisdom is a good advice, but it is often used in an ironic way when someone gives an advice that is obvious or not very useful.
'COST YOUR EYE OVER' : If you cast your eye over something, you look at it or check it quickly, without looking carefully at the details.
'SPOILT FOR CHIOSE' : When you have too many possibilities, and all of them good, you are spoilt of choise.
'STAY THE COURSE' :If you stay the course, you continue to do something, no matter how difficult is it.
'LIKE COLLECTING FROGS IN A BUCKET' : Something like collecting frogs in a bucket describes a task that is difficult to control or coordinate.
'A SLAP ON THE WRIST' : A very mild punishement.