Top Definition
a nice way to describe something that is run down and depleted. the term is attached to objects that owners place greater value on than it is actually worth.
"98 impreza for sale, 240k, all highway miles, runs good doe"

"oh, linda thinks she fine but she got some serious highway miles on that ass"
by deez_nuts September 10, 2013
1 more definition
When a girl has been dating someone for a long time and has only been having sex with then.
She's been with him for a few years, she's only got highway miles on that pussy.
by dabigcalhouna July 13, 2015

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