Swagger Jacking is when a person copies another persons quirky ways. Or even copies a catch phrase of anotha person and tries to pass it off as thurr own
A perfect example is the term "Suck A Dick No Homo" by Dipset. IF anotha group says this slogan they are Swagger Jacking
Someone who steals or copies someone elses style, slang, ideas, way of dress etc.
Like say i buy something first or do something first and you see me wearing what i brought or do what i did and you like it, then you turn right around and buy what i brought or do what i did thats what a swagger jacker is ya digz.
A person who jacks or steals someone else's swagger. When someone that is not very cool takes feels the need to take someone else's swagger or awesomeness to try and make themselves cooler.
Raul: Oh my god I'm so awesome! And i think I'll take the Spanish name Cristobal!
Josh: Oh my god that Raul kid is sooooo awesome and cool! The only way I can be as cool as him is to Swagger Jack him and take the name Raul.
Raul: Stop Swagger-jackin me, you will never be as awesome or cool as me.