A cigarette burn is term from the film industry to cue when a new reel is needed to be spliced in. They can be seen in the upper corners of most films in theaters. Most often the right hand corner. Although later films have been going digital and are now being distributed on disk rather than reeled film though many cinemas still use the old methods.
"hey Joe, we are already into reel four, I just saw those cigarette burns. Let's start cleaning up."
by Outlaw 61 November 10, 2013