Definitions by Mark-TWaine

back-o'-lantern 

When the sweat on your back, seeps through your shirt and imprints a face, resembling a jack-o'-lantern.

Look at the back-o'-lantern on that guy!

Dude, get a new shirt, you have a back-o'-lantern!

back-o'-lantern by Mark-TWaine September 5, 2012