heavyweight
hea-vy-weight
noun
A boxer or wrestler in the heaviest weight division.
"He became the new heavyweight champion."
noun
An influential or important person or organisation.
"She is a political heavyweight in the party."
adjective
Having the greatest weight or importance; significant.
"This is a heavyweight decision for the company."
Thesaurus
Synonyms: giant, colossus, titan, behemoth, super heavyweight, whale, hulk