Out Of It
American SlangDefinition
Slang for being mentally absent or dazed—not fully aware or engaged—often from fatigue, illness, distraction, or drugs/alcohol.
Examples
"I pulled an all-nighter and was totally out of it in class."
"He’s still out of it from the flu, barely following the conversation."
"After a couple of strong drinks, she was kind of out of it by midnight."