face the music

face the consequences of an error

Example:

I going to face the music. The boss wants to know why I threw the computer out the window.

fallout

the result of a situation

Example:

The fallout was that we all lost our jobs.

fancy footwork

clever words or movement

Example:

You'll need some fancy footwork to get yourself out of this situation.

fast one

a clever trick

Example:

That was a fast one! How did you think so fast?

flip

very angry

Example:

The boss flipped when he heard about the low sales figures.