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.