"Did one in" is a popular informal expression used to describe the feeling of complete exhaustion after a strenuous activity or event. Some common synonyms for this phrase include "wiped out," "exhausted," "spent," "drained," "fatigued," "weary," "knackered," "bushed," "depleted," "battered," "fagged out," and "pooped." These words all express a similar sentiment that suggests a total draining of one's energy and strength. Whether it's from a long day of work, a grueling workout, or a demanding event, it's important to recognize the signs of exhaustion and take the necessary steps to rest and recharge one's batteries.