The act of hitting the silent/reject/
ignore button when some one is calling you on your cell phone that you don't want to talk to. You are essentially telling them "
F you" hence it is called hitting the F you button.
This action may also be known as call
dodging or a polite hangup
My dad was calling to
gripe at me so I hit the F you button.
When my phone
rang and I saw on the
caller ID it was that ugly girl from down the street I had to hit F you button.