Here is a list of phrases, sayings and common expressions starting with S.
Set your heart on something
shaken not stirred
shoot yourself in the foot
shuffle off this mortal coil
sick to the stomach
smiling from ear to ear
smiling like a Cheshire cat
smooth runs the water where the brook is deep
spare the rod and spoil the child
speak softly and carry a big stick
stick your neck out
still waters run deep
straight from the horse's mouth
stupid is as stupid does