Grot was the fictional company founded by Reginald Perrin in the television series The Fall and Rise of Reginald Perrin.
A last gesture of defiance at the world, Perrin envisaged Grot as a company selling items that were deliberately useless - machines which did nothing, soluble umbrellas, games without instructions and the like. Unexpectedly, the stores became a great success, so in an attempt to sabotage them, Perrin hired many of the former staff of the now-bankrupt company for which he had worked, Sunshine Desserts.