Anilingus, also referred to as anal-oral sex, rimming, a rimjob, tossing the salad, or anal-oral contact (from "anus" and "lingua", commonly misspelled as "analingus", compare cunnilingus), is a sexual activity involving contact between the anus or perineum of one person and the mouth of another.

It is a distinct practice from anal sex followed by fellatio on the previously-inserted penis, which is referred to in the pornographic industry as ass to mouth. Both practices feature similar health risks. From a health standpoint, anal-oral contact may carry serious risks because of the presence of bacteria, viruses or parasites on or in the anus or rectum. Applying the mouth to the genitals immediately after applying it to the anus can inadvertently introduce the bacterium Escherichia coli ("E. coli") into the urethra, causing a urinary tract infection. Unprotected anal-oral contact also involves the risk of contracting sexually transmitted diseases, such as genital herpes or intestinal parasites.

Thoroughly washing the area can help reduce the risk of diseases. Another way to protect against any health risks is by placing a sheet of plastic wrap (or a dental dam) over the anus. This allows the passive partner to receive stimulation while protecting the active partner from bacterial infection.