Tori Amos' "Raspberry Swirl" seems to be just a fun electronic dance song at first until you attempt to decipher the lyrics and discover that the song might be about having sex with a woman on her period. If this interpretation is anything to go by, one could reasonably assume that the titular "raspberry swirl" is a mixture of menstrual blood and semen.
Death Metal has this some of the time in its lyrics (when it's not being plainly Satanic) and goregrind has it as a rule. Particularly notable is UK band Carcass, with songs with names like "Genital Grinder" and "Oxidized Razor Masticator".
Cryptopsy's original vocalist, Dan Greening, was often referred to as Lord Worm as he would usually dig up worms and eat themON STAGE.
Skinless's original M.O. was to create this by taking Toilet HumorUp to Eleven.note later albums shifted into politically-tinted Humans Are Bastards territory Their defining example, "Tampon Lollipops", in which a night janitor goes around fishing used tampons out of the trash and eating them, became Harsher in Hindsight fifteen years later due to the Giovanna Plowman Incident.
Dir en grey are masters of this. Almost any performance video will have something nauseating in it (uncensored "Obscure," "Agitated Screams of Maggots," and "Mazohyst of Decadence" are all notorious) and Kyo will occasionally intentionally vomit onstage.
The music video for the song "Sick, Sick, Sick" by Queens of the Stone Age involves a beautiful upper-class woman eating a huge banquet of greasy sweaty meat. Somehow that combination is a perfect recipe for Nausea Fuel.
Constipation Blues, by Screamin Jay Hawkins is a blues song written around Nobody Poops and eventually averting the trope.
Night T2 - Night T4 by the noise act The Gerogerigegege consists solely of a (possibly simulated) 4-minute long bowel movement.
The music video for "In Decay" by the obscure band Phedre aims for this - it even ends with actual vomiting over animal carcasses.
Green Day's "Geek Stink Breath" video can be this, as it features graphic, up-close footage of teeth being pulled - the patient was a friend of the band who agreed to have his real-life dentist visit filmed for the video. The uncensored version was only played on MTV late at night. The dentist footage actually sort of ties in with the song, by the way: It's about methamphetamine addiction, which is associated with bad oral health (hence the line "and it's rotting out my teeth").
The music video for Butcher's Harem's 'Clinical Sodomy'. Somehow the jittery, low-quality 3D animation makes it loads worse. Also doubles as Nightmare Fuel.
"Jowles" by Buckethead, in which guest vocalist Les Claypool describes...umm....whatever this is:
Les Claypool: They take the noggin, and they cook it down except for the larynx, and they tear all the chunks away from the bone. They use a grab bag, they don't throw nothin' away. They use the jowls, and the sheiks, and the collar, and the eyeballs, and the tendons, and the sniffer, and the mouth meat, and all the flesh and boil it down to a big jelly of fat.
Nirvana's "Mexican Seafood", which plays a bizarre STD for gross-out humor:
Now I vomit cum and diarrhea
On the tile floor like oatmeal pizza
Fill my toilet bowl full of a cloudy
Pus, I feel the blood becoming chowder rust
The music video for "A.F.F.C.O." by New Zealand rock band The Skeptics.