...and hair and carpet and bedsheet and the fur of my dog!
Don't panic! Slime is water soluble and comes off with water rinse easily - the slime will melt away with a gentle rub and wash in some water, whether on fabric, hair or dog (gentle rub please!).
If the slime is dried and stuck on the garment, soak the garment in warm water before washing.
NB: Slime sticks to porous surfaces such as wood and fabric. Although it can be cleaned with a water rinse, you will waste the slime that stuck.