Side Walker

-noun

Large individual who cannot walk straight down the isle, and must side step, thus slowing the whole boarding process.  There are varying levels of side walker, from level 1 to 3.  A level 3 side walker typically spans the entire isle, touching seats front and back, and instills absolute fear in all who have ever had one as a seat mate.  Typically requires a fat strap, and can also be deemed a double wide.

Usage:  The side walker's ass brushed my shoulder as she lumbered by.