| shoot off at the mouth | | | |
| shoot one's bolt | | | |
| shoot oneself in the foot | | | |
| shoot one's load | | | |
| shoot the boots | | | |
| shoot the breeze | | | |
| shoot the bull | | | |
| shoot the messenger | | | |
| short end of the stick | | | |
| short fuse | | | |
| short hairs | | | |
| short leash | | | |
| short of a length | | | |
| short on looks | | | |
| short-sheet | | | |
| short strokes | | | |
| short temper | | | |
| shot across the bow | | | |
| shotgun approach | | | |
| shotgun wedding | | | |
| shot heard round the world | | | |
| shot in the dark | | | |
| shots fired | | | |
| shoulder to cry on | | | |
| shout fire in a crowded theater | | | |
| shove it up your ass | | | |
| shove something down someone's throat | | | |
| show a clean pair of heels | | | |
| show a leg | | | |
| show ankle | | | |
| show colour | | | |
| showdown | | | |
| shower down | | | |
| shower thought | | | |
| show off | | | |
| show one's butt | | | |
| show one's cards | | | |
| show one's teeth | | | |
| show one's true colors | | | |
| show one's true stripes | | | |
| show someone a good time | | | |
| show someone a thing or two | | | |
| show someone one's etchings | | | |
| show someone the door | | | |
| show the flag | | | |
| show up | | | |
| show who's boss | | | |
| shrinking violet | | | |
| shuffle off this mortal coil | | | |
| shut my mouth | | | |
| shut one's eyes | | | |
| shut one's eyes and think of England | | | |
| shut one's face | | | |
| shut one's gob | | | |
| shut one's trap | | | |
| shy bladder | | | |
| sick and tired | | | |
| sick as a parrot | | | |
| sick at heart | | | |
| sick list | | | |
| sick man | | | |
| sick puppy | | | |
| sick to the back teeth | | | |
| sick with worry | | | |
| side issue | | | |
| sidesplitting | | | |
| sift out | | | |
| sift through | | | |
| sigh of relief | | | |
| sight for sore eyes | | | |
| sight to behold | | | |
| sight unseen | | | |
| sign in | | | |
| sign off | | | |
| sign of the times | | | |
| sign on | | | |
| sign on the dotted line | | | |
| silent as the grave | | | |
| silent killer | | | |
| silky smooth | | | |
| silly me | | | |
| silly money | | | |
| silly season | | | |
| silver-lined | | | |
| silver screen | | | |
| silver sheet | | | |
| silver spoon | | | |
| silver tongue | | | |
| silver-tongued | | | |
| simmer down | | | |
| simple as kiss your hand | | | |
| simplicity itself | | | |
| sing a different tune | | | |
| sing along | | | |
| singe one's wings | | | |
| sing for one's supper | | | |
| sing from the same hymnbook | | | |
| singing soprano | | | |
| single-minded | | | |
| single out | | | |