look up any word, like bukkake:
 
1.
Isg
It's so good
hey your photo is amazing, Isg.
thanks.
by wipe-youur-eyes.tumblr.com February 17, 2013
 
2.
ISG
In School Gangstas (I.S.G.)
A click of guys that live in Florida who run about 20 deep. They run their high school.
That click ISG got girls whenever they want em'.
by BGDaKiD23 April 11, 2009