aging out

Verb

age out (third-person singular simple present ages out, present participle aging out or ageing out, simple past and past participle aged out)

1. (intransitive) To become too old for an activity, program or institution; to become too mature for a behavior.
   • When foster kids age out of the system, it is important for the state to provide them with support.
2. (euphemistic, intransitive) To die or retire.
   • The party's chances in the coming election looked grim as a large portion of their voters were going to age out.