Ruck
/ɹʌk/
noun
A throng or crowd of people or things; a mass, a pack.
In Australian rules football
The situation formed when a player carrying the ball is brought to the ground and one or more members of each side are engaged above the ball, trying to win possession of it; a loose scrum.
verb
To act as a ruck in a stoppage in Australian rules football.
To contest the possession of the ball in a ruck.