greened-out adjective1 •(slang) Feeling unwell as a result of using excessive amounts of cannabis; extremely high.Anciients brings the riffs in a progressive way, while their vocals switch between death growls and soaring cleans – enough to disrupt you out of your greened-out trip for some serious headbanging. — 2022 formsmore greened out · more greened-out · most greened out · most greened-out