| Idiom | Meaning | Example | 
| I smell where you're stepping | 
I understand the direction of your thought, follow me, 
get my drift
 | 
"Do you understand?" "Yes, please continue. I smell where you're steppin'" 
 | 
| I'll be a monkey's uncle | 
I cannot believe it, I must be dreaming
 | 
When Farley won the new car, he said, "I'll be a monkey's uncle!"
 | 
| I'm afraid so | 
(See afraid so)
 | 
 | 
| icing on the cake | 
a bonus, extra benefit, the rest is gravy
 | 
We've sold enough tickets to pay for the trip. This money from the 
Elks Club is icing on the cake!
 | 
| idiot lights | 
warning lights on the instrument panel of a car
 | 
Kim wants a car with gauges, not idiot lights.
 | 
| if a mussel doesn't open don't eat it | 
if you force things to happen you may regret it, leave well enough alone
 | 
If you force a child to talk, you may regret it. As they say, If a  mussel doesn't open, don't eat it.
 | 
| if looks could kill | 
the look on your face was evil or hateful
 | 
If looks could kill, I'd be dead. Are you mad at me or something?
 | 
| if my memory serves me correctly | 
if I can remember well, if I have a good memory
 | 
Your name is Jose - if my memory serves me correctly.
 | 
| if only | 
I wish, we wish
 | 
If only we'd phoned before we came. There's nobody home!
 | 
| if that doesn't beat all | 
that is the best/biggest/worst I have ever seen
 | 
Fifty people in a phone booth - if that doesn't beat all!
 |