Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
hopped-up is an adjective meaning "(of an automobile) having the engine modified to give extra power". It carries 2 recorded senses.
(of an automobile) having the engine modified to give extra power
“a hopped-up jalopy”
car
Definitions, synonyms and semantic relations for hopped-up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.