shutting down

present participle and gerund of shut down

(transitive) To close, terminate, or end.
(ergative) To turn off or stop.
(figuratively, intransitive) To emotionally withdraw into oneself as a defense mechanism; to block out external stressors.
(figuratively, transitive) To suppress, block out, or reject (an idea or an aspect of one's personality or identity).
(slang) To pass (another vehicle), especially quickly.