"GILF" is a slang term that stands for "grandmother I'd like to F***." It is pronounced /gɪlf/ with a hard G sound at the beginning and the I and L both pronounced with a short i sound. The F is pronounced as the letter name and not as the word "eff." While the term may be used in a joking or playful manner, language and social etiquette dictate that it is not appropriate to use this term to refer to someone, especially someone of a certain age.