According to Early Onset of Night it is
mechanically separated chicken. It’s what all fast-food chicken is made from—things like chicken nuggets and patties. Also, the processed frozen chicken in the stores is made from it.
Basically, the entire chicken is smashed and pressed through a sieve—bones, eyes, guts, and all. it comes out looking like this.
There’s more: because it’s crawling with bacteria, it will be washed with ammonia, soaked in it, actually. Then, because it tastes gross, it will be reflavored artificially. Then, because it is weirdly pink, it will be dyed with artificial color.
Mechanically separated meat is a paste-like or batter-like meat product created by forcing unstripped bones under high pressure through a type of sieve to separate edible meat tissue (including tendons and muscle fiber) from the bones. Contrary to what is claimed above, the process does not involve the grinding up of entire animal carcasses ("bones, eyes, guts, and all") into one large, amorphous glob of meat; it is a technique for removing what is left on the bones of a carcass after all other processing has been completed. (Also, although meat packing plants typically use anhydrous ammonia for refrigeration purposes, with ammonia leakages having on occasion caused contamination issues at such plants, and sometimes introduce additional