– a general dullness, or lack of mental acuity combined with a person having the extra pale countenance or otherwise gaunt, unhealthy and tired appearance of one who has spent several days, typically over a weekend, partying excessively by binge drinking, ingesting numerous illicit drugs, and then compounding it by suffering from a lack of sleep. The term is a reference to the results of overexposure to sun, hashish and psychedelia that numerous fair skinned British people often subject themselves to when they take cheap charter trips to visit Goa, India, which is known for drugs, hash, hippies and rave parties.
“Arthur was dull as dirt and looked like shit this morning in the Monday management meeting. He’s got a Goa Glow.”

Friend: Hey Barrett, snap out of it!

Barrett: Huh? Sorry mate, just nodded off for a second there.

Friend: What the hell’s wrong with you? You always seem to have the Goa Glow these days.
by Sunderwear January 22, 2011
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