This occurs when a person is stranded on a lonely figurative island of desperation by being disconnected from the internet and walks by a free wifi area (restaurant, home, cafe, etc...), and nonchalantly stands outside and mooches the wifi signal.
Ah sorry I'm late man, my internet is down again. I totally had to drive-by wifi that Cosi on the way over here.
by badassbootydrop July 8, 2010
Get the drive-by wifimug.