| Idiom | Meaning | Example | 
| so small you had to back out to change your mind | 
very small, tiny, as small as a phone booth
 | 
I've seen small apartments, but this one was so small you had back out
to change your mind.
 | 
| so-so | 
neither good nor bad, fair, fair to middling
 | 
"How's the wife, Byron?" "Just so-so, not much better. 
The doctor says she needs rest."
 | 
| so to speak | 
using expressions or metaphors when speaking, to use the vernacular
 | 
Ron was up the creek, so to speak. He'd promised to marry Suzy,
but he was already married to Joan.
 | 
| so what | 
what is the difference, what does it matter, who cares
 | 
So we lost the game. So what! It doesn't matter.
 | 
| soap box | 
(See get off your soap box)
 | 
 | 
| sob story | 
a sad story, a story about  love lost or misfortune, cry the blues
 | 
Have you heard Keiko's sob story? She lost her boyfriend and her cat on the same day.
 | 
| sober up | 
become sober, wait until you are not drunk
 | 
Give him a few hours to sober up. He'll be okay after he has a rest.
 | 
| sock it to me | 
tell me, give it to me, hit me, shoot
 | 
"It's bad news," he said. "Sock it to me," I said.
 | 
| soft in the head | 
foolish, crazy
 | 
If you quit your job at Gulf Oil, you're soft in the head.
 | 
| soft market | 
a period when sales are few and prices are low, buyer's market
 | 
The real estate market is soft now. Don't try to sell your house.
 |