Spacing out, staring at nothing, or just totally zoning. Usually when you’re bored, tired, or your brain just decides to take a mini vacation. Nothing gross or weird, just funny or random.
"I totally missed what she said, I was gooning the whole time."
The act of zoning out, mindlessly staring into space, or losing oneself in thought; often done humorously or casually among teens. Not necessarily associated with anything inappropriate or explicit.