The phrase "copped some z's" is an informal expression that means "to get some sleep." However, if you're looking for antonyms for this phrase, there are several options. For example, "pulled an all-nighter" means to stay up all night without sleeping. "Insomnia" refers to the inability to fall asleep, while "restless" refers to restlessness or anxiety that makes it difficult to sleep. "Night owl" is a term used to describe someone who prefers to stay up late at night and is often used as an antonym for "early bird," which refers to someone who wakes up early in the morning. Finally, "exhaustion" is a state of extreme tiredness or fatigue that makes it difficult to stay awake.
