Helmet hang is when the male genitalia is displayed and is considered unsightly and grotesque. A guy with to much helmet hang will find it almost impossible to get laid.
Girl 1:- what's that new guy like that your dating?
Girl 2:- he's cute but he has really bad helmet hang!
noun - a person who comes to a party or a gathering where drugs or alcohol are being consumed and becomes too intoxicated too early or just too tired and falls asleep, passes out, or leaves. this term is used to heckle a person in that situation.
Party host: "aw man im tired, i gotta gobed, you guys gotta go home"
Guest or guests: "BOOOO!! NO-HANG!"
Smoker#1: "Yo, its your hit"
Smoker#2: "Naw I cant take anymore"
Smoker#1: "No-hang...."