Spacing

The feeling of change in perception after taking a mind altering drugs,

for example: hallucinogenic or disassociative compounds.

Dude1: BRO I'm spacing on this dank kush.

Dude2: SAME ni🅱🅱a

Space brain

When your thoughts are all over the place and/or you are dissociating. Seen in neurodivergent people, and high people.

Friend one: Got space brain today
Friend two: Mood
Friend one: I didnt know you smoke weed too
Friend two: Oh. I just have ADHD