Here, you can put your ideas for slimes in the comments. Here's an example:
Freaky Slime
Diet: Anything
Favorite Food: Purple Hen-Hens
Rarity: Uncommon
Default value of Plorts: 100 (They have black and white Plorts. The Plorts themselves have a marble-esqe pattern. They also glow in the dark.)
Aggressive: Only to The Tarr.
Appearance: Similar to White Face from Imscared.
Slimeology: Freaky Slimes are among the scariest-looking slimes on the ranch, right next to The Tarr. However, due to the scariness of these slimes, they scare all other slimes away except The Tarr and other Freaky Slimes. Because of this, most Freaky Slimes are lonely and sad because no one wants to be around them. If a rancher finds one however, these slimes will be happy to find that someone cares about them. If it encounters a Tarr or is in the middle of a Tarr outbreak, these slimes will fight to the bitter end, and probably take a few Tarrs with them.
Rancher Risks: Like a Pink Slime, there isn't much to worry about with a Freaky Slime, and they're very happy to be around a rancher. Freaky Slimes are quite handy when it comes to wiping out small Tarr outbreaks, so just about every rancher has about five or six of them.
Plortonomics: Freaky Plorts are great for glowsticks and Halloween decorations.