An offensive situation in which the offense has more players line up on a specific side of the center.
Sometimes referred to as a "Stacked Line."
During short yardage situations the offense may put more offensive linemen, tightends, running backs or receivers on one side to have a better chance of getting the necessary yards or getting into the endzone. This formation can also be used as a ploy to fake out the defense and send a play to the weak side (side with fewer offensive players). Offensive lines may have to be lopsided during an entire game if the defense is having an easy time getting into the back field on one side.