Furby. Oh yes. Furby.
Melanie Lynne Hauser: It's been a while since my kids had those kinds of toys, but I do remember those horrible Furbies that wouldn't shut up.
"Margalit T: Hmm, the Furby, but I'm afraid that if I threw it at the wall, it would still keep screaming at me. Can you imagine? "Thump thump Smash... I love you.. Sleepytime...I love you Smash!"

Favored gifts from well-meaning relatives who do not value Mommy's sanity
Amber: Um… that f***ing singing Barbie princess!!
Jennifer: Robbie the Noisy Assed, Styrofoam Ring Shooting, Irritating Robot

Jedi Mothering Skills
Susie Sunshine: All those toys mysteriously disappear when they are left laying about. But I feel there is a special place in hell reserved for the creators of that migraine-in-a-box called "Hungry, Hungry Hippos"
Ann Douglas: I would say the Game Boy, but I believe it died an unfortunate and mysterious death. Or it disappeared. Or something...
Krisco: The heinous Glow Baby. It goes off you blink. It can be in another room, and you blink it will go off. And play a really insipid, annoying tune. Not to mention Glow. And just remind the children how much they love it and need to play with it some more. Thankfully, my sister has given us TWO heinous Glow Babies. (In our case, it is okay to throw them against a wall - it won't set them off, really - because their insides have secretly been removed and hidden. (Yes, the hidden insides still go off all by themselves sometimes, but I pretend to the girls that the closet always made that noise.))"

Wiggle this, suckah.
Jen from MUBAR: Those Wiggles dolls with their faces frozen in that terrible rictus. We don't have any but even seeing them in the store puts me in a bad mood.
Tuesday: Hands down the wiggles guitar. I do not want fruit salad, nor do I want to hear the fruit salad song again.

Some marketing guru is trying to destroy the ideal of silent children, cheerfully doing chores.
Jenn: This would have to be that talking vaccuum cleaner that Gab has...says really mean things like "Wow, this place is a real pigsty" As if I need toys being so critical of my housework!
Kris: The Talking BBQ Grill by Hasbro. There's a reason this toy is no longer available on Amazon.com: the thing never shuts up! As one eloquent reviewer there put it, "Are you sane? Well you won't be if you buy this grill!!!!"