Face the music:
To deal with the consequences.
Well, I was caught speeding on the highway, so I'll just have to face the music and pay that expensive fine.
Fair game:
Someone or something that is easy or open to attack or criticism.
Their audience is fair game, and I think we should try to get them to see our movie instead.
Fair weather friend:
Someone who is only friends with you when times are good.
Don't worry about breaking up with him. He was only a fair weather friend anyway!
Finger lickin' good:
Food so good, you want to lick your fingers to taste it after you’ve eaten.
Those french fries were finger licking good.
Flea Market:
Place where people buy and sell things.
At the flea market, I got a used couch for only 50 bucks!
Flesh out (your ideas or opinions):
Add details.
I have a rough idea of the story I'm writing, but I need to flesh it out.
Flush out:
Force someone/something to leave a hiding place.
I'm gonna use loud noises to flush the cat out of the closet.
Follow Suit:
Do the same thing that someone else did already.
England legalized gay marriage, but Uganda isn't likely to follow suit.
For good:
Forever.
Now that we blocked them, they should stop calling us for good.
French Kiss:
An open mouth kiss where tongues touch.
She french kissed him - it was gross!
Frog in my throat:
To have difficulty speaking because your throat feels dry
I had a frog in my throat during the presentation, and I had to have a drink of water.
From Rags To Riches:
Someone goes from being poor to being very wealthy.
The lottery winner has a rags to riches story.
Full blast:
To the highest extent possible.
I couldn't sleep last night! My neighbor was playing his stereo at full blast.