Any rod thingy that simulates a cock that a woman or man can stick in her or his mouth, pussy, or anus. Some vibrate, while others don't. Dildos are made of different materials.
Women and men, listen.
After you stick your dildo in your ass, do not suck on it or put it in your pussy. There is shit or at least fecal residue in your ass (remember, shit comes out of your asshole), and you don't want to eat shit. Otherwise, you might as well pick up your poop from the toilet bowl and take a bite. And forget about wiping your ass because that's basically what you are doing when you rub that ass-plugged dildo all over your pussy, your mouth, and, god forbid, my mouth and ass.
Separate dildos for ass and mouth.
Hell, guys. It's just hell.
Heck. Don't you think God knows you meant hell?