an unpleasant fact or situation which people accept because they cannot change it.

She grew up in Northern Ireland during the 1970s when violence had become a fact of life. (not used with the)

• for a price
• for a song
• for better or for worse
• for better or worse
• forbidden fruit
• force hand
• force of habit
• for certain
• force someone's hand
• force to be reckoned with
• for Christ's sake
• for crying out loud
• For crying out loud!
• foregone conclusion
• forelock-tugging
• forewarned is forearmed
• Forewarned is forearmed.
• forget about
• forget about it
• forget about something
• forget it
• forgive and forget
• for God's sake
• for good
• for good measure