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1.
The collaboration of Jack Barakat of All Time Low and the clothing line Glamour Kills. It was launched in January of 2009. There are various hoodies and t-shirts you can buy.

JA = Jack
GK = Glamour Kills.
Person 1: Who is that pop-art person on your shirt?
Person 2: Jack from All Time Low. JAGK is so badass.
by modernxlove June 14, 2009
 
2.
Jack Barakat's (The lead guitarist of All Time Low) clothing line with Glamour Kills.
JA- Jack Barakat
GK- Glamour Kills

He recently released JAGK 2.0
"Oh I haven't seen that JAGK tee yet!" :00
"Yeah! This is the 2.0"
"Waaaaay coool!"
by alltimeblow-nothingpersonal August 26, 2009