| Idiom | Meaning | Example | 
| slip away | 
die, pass away
 | 
Grandma slipped away during the night. She was gone by morning.
 | 
| slip of the tongue | 
(See a slip of the tongue)
 | 
 | 
| slip out | 
leave quietly,  slip away
 | 
I'll slip out and check the parking meter. Be right back.
 | 
| slip out | 
speak carelessly, say it without thinking
 | 
I didn't mean to answer, Sir. The words just slipped out.
 | 
| slip up | 
cause a small mistake, make a booboo
 | 
The singer didn't slip up once - not even a little mistake.
 | 
| slip your mind | 
forget, not remember
 | 
I met her at church last Sunday but her name slips my mind.
 | 
| slippery slope | 
dangerous path, a path that leads to problems
 | 
When you assume that people are bad, you are on a slippery slope.
 | 
| slo mo | 
slow motion, movement becomes slower, time stands still
 | 
Are you in slo mo today? You're moving like a snail!
 | 
| sloshed to the gills | 
very drunk, loaded, plastered,
 | 
She was sloshed to the gills and singing very badly.
 | 
| slow as a dead snail | 
(See as slow as a dead snail)
 | 
 |