kick-ass 强势的，粗暴的
Meaning: forceful, aggressive
For example:
Geoff says he's sick of kick-ass politicians sending our kids off to die in unnecessary wars.
Some people seem to think a macho, kick-ass image is good for the country, but I think it makes us look like immature schoolyard bullies.
Variety: This slang is typically used in American English but may be used in other varieties of English too.