Zooned out, Zooned, Zooning, Zoon, etc. are all forms of the term "zooned out"
A prolonged Nitrous Oxide high, where the user keeps inhaling more before the effects wear off, remaining in a goofy, meditative state for long periods of time.
The effects of nitrous wear off in 30 seconds or less, so users may keep one or more balloons on standby to "top off" the high when they start to come down. zooning can last anywhere from a few minutes to several hours depending on how much gas you have on hand, and how retarded you want to get.
While zooning, you're usually mixing with other drugs, laying or sitting down due to a loss of mobility, with a balloon in your mouth or in your hand, taking a small hit every 5-15 seconds to remain in a state of pure bliss.
the term is a play on words, coming from the term 'zoned out' but instead, you're "zooned out" because of how stupid and unresponsive you are off the gas.
Craig: "Bro, I just picked up a 640 and an 8th, we're going on a bender!"
James: "Fuck yeah brev, I'm gonna be zooned out tonight"
Craig: "hell yeah, I'll put some sewerslvt drum covers on and get this shit crackin"
James: "Nah bruh, I only listen to reggae off the nos"