Slime is a toy product manufactured by Mattel, sold in a plastic trash can and introduced in February 1976. It consists of a non-toxic viscous, squishy and oozy green or other color material made primarily from guar gum. Different variations of Slime have been released over the years, including Slime containing rubber insects, eyeballs, and worms.

Guar gum, also called guaran, is a galactomannan polysaccharide extracted from guar beans that has thickening and stabilizing properties useful in food, feed, and industrial applications. The guar seeds are mechanically dehusked, hydrated, milled and screened according to application. It is typically produced as a free-flowing, off-white powder.