The phrase "homegrown quota" refers to a policy or rule that limits or reserves a certain number or percentage of resources, opportunities, or people for the local or domestic population. Full definition
Jenkinson is equally awful as Debuchy but we must keep him for homegrown quota reasons, these quota rules are killing english clubs especially in the champions league where they go in with weaker squads that are supplemented by english players like Wilshere, Walcott, OX, Gibbs etc who are not at champions league level (justarsenal.com)