"Lost one's senses" is a phrase used to describe a person who becomes irrational, disoriented, or confused, often due to extreme emotions or physical exhaustion. There are several synonyms for this phrase, including "delirious," "confused," "bewildered," "dazed," "disoriented," and "unconscious." Some other phrases that convey a similar meaning include "out of one's mind," "crazy," "insane," and "off one's rocker." In medical terms, the phenomenon is referred to as "acute confusional state" or "delirium," which can be caused by factors such as sleep deprivation, drug abuse, or sudden withdrawal from alcohol or medication. Whatever the cause, losing one's senses can be a frightening and disorienting experience.