To steal someone else's unique style that sets them apart from the crowd, makes them famous, or otherwise steals their thunder making them warrant a lot less attention or swagger factor.
A good part popularized by celebs and hip hop songs like Black Eyed Peas - Boom Boom Pow. The female artists in the song sings, "Them Chickens jackin' my style. They try to copy my swagger. I'm on that next shit now."
A guy goes to a uppity club or a local trendy, upscale hang out spot with a few friends but dresses up in fancy black clothing to top the competition which earns him attention of beautiful women. He starts to notice more and more men doing the same looking and acting more like him. He realizes they are nothing but lame swagger jackers who have no real game of their own but to live off someone else's own success.
The STD you get if you bang a chav. Results in painful screeching sounds from the inflicted person.
Matt went out with Kelly, who has a notorious rep as a chav, last night. The next day he was screaming so badly that the neighbourhood complained repeatedly. He has Swagger Jagger
Always bopping when walking, always having bling, always wearing your trousers low batty, actin like you thinkin your all bad and that, having a tinted car with alloys, and wearing a cap (such as a NY cap)
Osman & Habib & Yahaya (all together) : Oi, bro!!! you have your swagger in check!!! tell us how to do it, your tinted alloyed car and your cool clothes! check that swagger!!! that SWAGGER IN CHECK
Abdul: Oi ma boyz stop breading me yeah, I got nough with dad and mum loving me the most for ma swagger everyone keep it cool no one can beat ma swagger cos its in check