whacking
[adjective]
Synonyms: huge, colossal, enormous, gargantuan, gigantic, immense, mighty, prodigious, whaling, whopping
[adverb]
Synonyms: very, awful, awfully, big, damned, exceedingly, highly, hugely, much, whopping

[TahlilGaran] English Synonym Dictionary ▲

whack‧ing /ˈwækɪŋ/ adverb
whacking great British English spoken very big Synonym : whopping:
a whacking great gas bill

[TahlilGaran] Dictionary of Contemporary English ▲