Meaning a small or short emo.
e- (emo) midge
for example a 10th grader may be allowed to call a emo 7th grader an e-midge cuz the 7th grader is smaller in height
guy 1 (17): DAYUM! look at that 14 year old.. SUCH AN E-MIDGE!
girl 2 (16): OMGAWD your right!