Top Definition
Similar to the term happy trail, but only the trail of hair begins in the chest area and then down to the crotch.
That's one congested happy highway you've got there!
by BurconBager October 14, 2010
A happy trail that is way over grown.
You need to shave your happy highway.
by Stone Mill Goat Ropers October 04, 2004
big fat happy trail. you know what i'm talking about.
Wow, I've walked the happy trail, but you make me ride the happy highway...!
by J. Dawn Snow November 13, 2006
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