- Used other than as an idiom: see pink, slime. Slime which is pink.
- (paper manufacture) An undesirable pink-colored microbial mass occurring in the slurry used in making paper. [from 1951]
- (informal, dysphemistic) A meat byproduct produced from scraps by heating and then treating with ammonia to produce a food additive. [from 2002]
(meat byproduct): This term is primarily used by critics of the product. The meat industry and product labels use the terms lean finely textured beef and boneless lean beef trimmings.
Apparently first applied to food in 2002 by Food Safety and Inspection Service microbiologist Gerald Zirnstein.