abbrev. of 'Hot Gay Nerd'. The rarest of all gay subspecies. Often found in colleges & universities.
Bystander 1: look at the dude over there.. with the black frame glasses... and the book titled "da vinci code" in front of his perfectly chiselled torso

Bystander 2: yep, no doubt about it he's a HGN.
by HGO April 28, 2006

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