This is a Greek life term used to describe the little of your little. It stands for "gran-little".

The Glittle would call you GBig for "gran-big"
Sorority Girl #1: "Did you hear? Amanda took Ari!"
Sorority Girl #2: "No way! I have a GLITTLE!"
by axoxo March 31, 2011
Get the Glittle mug.