Safe bet:
Something that is not very risky.
Let's just go to park for her birthday. It's safe bet that everyone will like it.
Save face:
To do something so that you don't lose respect.
The world's best runner lost the race, but said he was injured to save face.
Scapegoat:
A person who takes the blame.
Don’t be a scapegoat. It’s not your fault this happened!
Seize the Day:
Live for today. Find and use opportunities now.
I need to quit wasting my time and seize the day.
Sell (something/someone) short:
To overlook something/someone's good qualities, to undervalue something/someone.
Don't sell yourself short. You're doing a great job!
Sick As A Dog:
To be very sick.
I’m sick as a dog. My legs are sore, my throat hurts, I have a headache, and I’m burning up! (burning up =fever)
Sitting (or Riding) Shotgun:
Being in the front passenger seat of a car.
Hey! I called shotgun. You sit in the back.
Skip class:
When a student intentionally doesn't go to class.
The naughty students skipped their biology class this morning.
Sleep in:
Sleep late in the morning or even until the afternoon.
I'm sleeping in. It's the weekend!
Smell Something Fishy:
Thinking something isn’t right about the situation (or a person).
Something smells fishy here. I don’t like it. I think it’s a trap!
Southpaw:
Someone who is left-handed.
My English teacher Josh Shaman is left-handed! Cool!
Shower with:
Cover someone with.
James Taylor sang, "Shower the people you love with love!"
She's so rich, she probably showers with money.
Spread the Word:
Tell people some information.
Spread the word about Skype English Class Now!
Start from Scratch:
Start over from the beginning.
Our plan failed, so we had to start over from scratch.