DDF stands for “drug & disease free.” The acronym DDF was originally used in print ads to indication the person doesn’t use drugs or have sexually transmitted diseases or infections. It’s commonly used by the LGBTQ+ community but is sometimes used by heterosexual users on dating apps. The abbreviation may be more commonly used in LGBTQ+ spaces because the high mortality rates among gay men during the AIDS epidemic made them more aware of the risks associated with unprotected sex. This led to routine HIV testing and the widespread use of condoms. The “disease” in DDF has historically referred to a person’s HIV status, but it can also mean other STDs and STIs, like herpes, chlamydia, or gonorrhea. “Drug-free” has also become a more ambiguous term with the legalization of marijuana in many areas. Some may consider it to be a drug, while others see it in the same category as alcohol. DDF refers to a person’s current status. They may use the term even if they have used illegal drugs or had an illness in the past but are no longer using drugs and are currently healthy.