F - What is f short for?

F has 2 meanings. The most common is "Female." See examples of how people use the terms.
In personal ads and forum posts that require a poster to specify their gender, F is short for female. Usually, a poster's gender is accompanied by their age. For example, a 26-year-old female may write her age and gender as 26F.

A very short history of the F-word - Big Think

Detailed laser processing with F-Theta lenses

1995 Ford F-150 Country Classic Cars

Distinguished by its impressive speed, the FUJIFILM GF 80mm f/1.7 R WR is a short portrait-length prime built for the GFX mirrorless medium format

FUJIFILM GF 80mm f/1.7 R WR Lens (FUJIFILM G)

The F-35B: First Descent

Short Tactel F*king Gang KVSH x Nephew Preto - Nephew Clothing

Charles F. Glassman Quote: “Short-term pain leads to long-term gain.”

This Is the Short-Lived, but Most Advanced F-14 Tomcat That Ever Existed

Press F to Pay Respects: What Does F Mean Online?

Abbreviation: M = male, F = female, a Drive for muscularity, calculated

Short com Franzido Bumbum Up (Vinho), Ref: K2883-F