Definition
To depart from any conversation, online or in person; to say goodbye.
How People Actually Use It
When you masturbate while pooping. A combination of dropping a log and jacking off.
"Guy1: "Did you just Log Off in the work bathroom?!" Guy2: "Do you mean masturbating while pooping? I wouldn't do that!" Guy1: "I heard you and smelled it! I know you were Logging off in the stall next to me and if it every happens again I will kill you!""
Source: Urban Dictionary