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2.
An adjective used to describe a car or engine which is modified to have more power.
A similar term would be souped up.
Dude: "Damn that car's fast!"
Dudley: "Yea, he really hopped up that car."
by morningwould September 14, 2013
 
1.
high or stoned

-from "hop", a nickname for heroin and/or opium, but can refer to the effects of any drug.
everyone got all hopped up at the concert and the after party.
by lucky September 10, 2004