I work at a department store and we sell these huge bottles of handsoap (the kind used for public bathrooms) the stuff is both smooth and sticky. I was thinking it might make for a good slime recipe? any thoughts?

Years ago I mixed in Johnson & Johnson baby soap (the stuff that "won't sting baby's eyes") into the slime.... Ostensibly just to keep the chunks from sticking in the model's hair. Not sure who told me this was a "foolproof method" to keep that from happening, BUT....

Both models (who'd shot with me before) said it stung worse than ANY slime I'd used before. And it did nothing for the chunks. So I abandoned THAT idea pretty quick. And eventually moved to chunk-free slime (sorry guys).

So yeah, if a small amount (maybe 1/8 cup) of baby soap causes that much grief, I can't imagine trying to make slime ENTIRELY from hand soap. I suspect whatever model you dumped it on would end the scene immediately, go to the showers, and then never speak to you again. (And she'd be well within her rights...)

Got any info on the ingredients? A lot of liquid soaps use a base that's the same or similar to some slime ingredients, like methylcellulose I think. The major difference is that the surfactants created the lather/foaming effect. I guess it depends on if you specifically want that or not.

Mixing in cooking oils helps w keeping chunks of flour out of the hair. Wouldn't use soap or shaving cream cause of stinging. ( I know some people prefer shaving cream pies/slime)

I've used palmolive shave stick grated and mixed with hot water, took a good bit of effort but made some amazing sticky slime! Made up a couple of batches, even tried a bit of wallpaper paste to see if it would "set" more.

I had a phase of playing in my favorite St. Ives Lotion the green coloured Replenishing Mineral Therapy. I like the sexy smell of it. A few times I mixed in Olay Bar soap. I found the Olay bar soap easy on my skin and like the scent.
I used a kitchen motorized grater like for shredding cabbage. Then hot water and a hand blender , then add lotion. Resulting in a creamy foam. Nice and slippery feel to it. Does sting the eyes. Was fun a few tries but just prefer the lotion as is.

I came up with the way of liquefying the bar soap for the purpose of washing off metallic paint as dish detergent is rough on the skin and liquid hand soap or body wash is based on cheap Sodium Lauryl or Lauryth sulphate that is a cheap degreaser and rough on the skin. Google up the health concerns of Sodium Lauryl Sulfate (SLS)

I've played with liquid soap by adding flour and/or cake mix to it. This makes a very sticky and clingy goop which adheres to all of your nooks and crannies, and somewhat surprisingly does not clean off quickly - a feature I actually find attractive given my masochistic bent

I would agree that you don't want the stuff in your mouth - even if you're into mouth soaping - because of the added chemicals.

SLS is a more common surfactant than you think. It's in almost every shampoo including some of the 'natural' ones. It's a great marketing strategy for selling conditioner!

OP, you're probably going to be better off using lotion or lube.

My high school years almost 20 years back I tried cake batter, oat meal and or flour mixture with some shampoo in there . Didn't like the texture and clean up. Will take clay, lotion or paint any day. It was worth a try. The slime effect of cake batter looks cool but play is not for me. Despite the work cleaning up paint how it looks and feels is worth it.
Tonight I got the girlfriend to play in the shower with lotion. She liked it. Just wash off..