What is the meaning of Eff?

Fuck

To put into words; to express.

Alternative spelling of ef; the name of the Latin-script letter F/f.

The name of the Latin-script letter F/f.

The name of the Latin-script letter F/f.

The name of the Latin-script letter F/f.

The name of the Latin-script letter F/f.

The name of the Latin-script letter F/f.

Source: wiktionary.org