spaced out
adjective [ after verb ] slang uk/ˌspeɪst ˈaʊt/ us/ˌspeɪst ˈaʊt/ (also spacey, spacy)
（尤指因吸毒或缺乏睡眠而）昏昏沉沉的，精神恍惚的
Someone who is spaced out is not completely conscious of what is happening, often because of taking drugs or needing to sleep.
I hadn't slept for two days and was completely spaced out. 我两天没有睡觉了，完全是昏昏沉沉的。