Grandmother I'd Like to F***
As in "Wow, she's a grandmother? She's still a GILF to me," it refers to "attractive older women" (or a cougar) who lives by the adage that "50 is the new 30." It is an acronym used in texting, online [[chat or chatting|chat]], instant messaging, e-mail, blogs, and newsgroup postings, it is also considered a form of online jargon or text message shorthand.
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NetLingo Classification: Acronyms and Text Message