Liverpool have issued members of staff with a list of "unacceptable" words or phrases to combat all forms of discrimination at Anfield.
"Don't be a woman" and "play like a girl" are some of the more moderate examples from the guidelines, which have the headings of "race and religion, sexual orientation, gender and disability".
It has been given to staff who come in to contact with the general public.
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The move by Liverpool has been backed by anti-racism pressure group Kick It Out.