| Idiom | Meaning | Example | 
| SOS | 
"Save Our Ship" or "Save Our Souls", a distress call, a call for help, mayday
 | 
When I was stranded in the North that winter, I tramped messages
in the snow: H E L P and S O S.
 | 
| soul mate | 
the person who is your natural and compatible mate
 | 
I thought Carson and I were soul mates, but we disagree a lot.
 | 
| sound asleep | 
sleeping peacefully, dead to the world
 | 
When Tara went to check the baby, he was sound asleep.
 | 
| sound bite | 
radio advertisement, a few seconds of radio time
 | 
I advertise our hotel on the radio using ten-second sound bites.
 | 
| sound off | 
complain, get it off your chest, speak out
 | 
He was sounding off about our papers - how bad they were.
 | 
| sounding board | 
a person who listens to ideas or plans
 | 
Cliff used Linda as a sounding board for his business plans.
 | 
| sour grapes | 
feeling negative because you did not win
 | 
If she loses, she complains about the referee. It's just sour grapes.
 | 
| sour puss | 
one who is feeling sad, an unhappy person
 | 
Don't be such a sour puss. Let's have fun.
 | 
| southpaw | 
left-handed person, lefty
 | 
Our baseball team needs another pitcher - preferably a southpaw.
 | 
| sow wild oats | 
live a wild life as a young person
 | 
As a youth he lived a reckless life. He sowed a few wild oats.
 |