The teacher marked several Fs on the students' papers after the difficult final.

I'll be at the party tonight, fs.

Please FS my name slowly so I can follow along.

She used FS to spell out the unusual name during the meeting.

The editor used fs to indicate multiple instances of the letter f.

During the 1870s campaign, Irish tenant farmers chanted the three Fs — free sale, fixity of tenure, and fair rent — until their demands could no longer be ignored.

During the raid, everyone spammed Fs in the chat to show respect.

During the review, the committee identified several P/Fs that needed further definition.

She Fs off anyone who interrupts her during her performance.

Many FSBOs attract bargain hunters but often face legal pitfalls without professional guidance.