| sabre-rattling | | | |
| sack drill | | | |
| sacked out | | | |
| sack of crap | | | |
| sacred cow | | | |
| saddle tramp | | | |
| sad drunk | | | |
| sad panda | | | |
| safe and sound | | | |
| safe in the knowledge | | | |
| sail the high seas | | | |
| sail the Red Sea | | | |
| sail under false colors | | | |
| salad | | | |
| salad days | | | |
| salad year | | | |
| salami-slice | | | |
| salami slicing | | | |
| salt away | | | |
| salt in the wound | | | |
| salt of the earth | | | |
| salt the earth | | | |
| salty tooth | | | |
| same difference | | | |
| same old story | | | |
| same, same, but different | | | |
| Santa's workshop | | | |
| save by the bell | | | |
| saved by the bell | | | |
| save face | | | |
| save for a rainy day | | | |
| save it | | | |
| save one's breath | | | |
| save someone's face | | | |
| save someone's life | | | |
| save something for a rainy day | | | |
| save the day | | | |
| save the furniture | | | |
| sawdust trail | | | |
| saw logs | | | |
| saw wood | | | |
| say again | | | |
| say cheese | | | |
| say goodbye | | | |
| say grace | | | |
| say it all | | | |
| say no more | | | |
| say one's prayers | | | |
| say the quiet part loud | | | |
| say the word | | | |
| say uncle | | | |
| say what | | | |
| say when | | | |
| scalding hot | | | |
| scared green | | | |
| scared shitless | | | |
| scared to death | | | |
| scare someone to death | | | |
| scare story | | | |
| scare straight | | | |
| scare the life out of | | | |
| scare the living daylights out of | | | |
| scare the pants off | | | |
| scholar and gentleman | | | |
| schoolboy error | | | |
| school of hard knocks | | | |
| Schrödinger's douchebag | | | |
| Schwung | | | |
| scope out | | | |
| score off | | | |
| Scotch mist | | | |
| scrape along | | | |
| scrape someone off the ceiling | | | |
| scrape the bottom of the barrel | | | |
| scrape through | | | |
| scrape together | | | |
| scratch an itch | | | |
| scratch beneath the surface | | | |
| scratch by | | | |
| scratch one's head | | | |
| scratch one's own itch | | | |
| scratch that | | | |
| scratch the itch | | | |
| scratch the surface | | | |
| scratch together | | | |
| scream bloody murder | | | |
| screaming trots | | | |
| scream loudest | | | |
| scream one's head off | | | |
| screen door on a submarine | | | |
| screwed, blued and tattooed | | | |
| screwed up | | | |
| screw it | | | |
| screw off | | | |
| screw the pooch | | | |
| screw this | | | |
| screw you | | | |
| scum of the earth | | | |
| sea change | | | |
| seagull approach | | | |