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Used to describe a profound stench, usually one with sulfurous overtones.
I'm not sure which is worse: the hell-smell down by the Geysers, or the hell-smell that emerges from the bathroom when Ranger Bob takes a dump.
by Rod Brock July 24, 2006
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Totally relaxed and chill, a.k.a. hella mellow.
Girl 1: So I hear you scared off George Clooney with your repeated text messages.

Girl 2: Whatever!! I sent him like TWO texts. It was hells mells!

Girl 1: Whoa, you need to mellow out. You know George Clooney scares off easily.
by newsvava February 12, 2009
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