a loose scrum formed around a player with the ball on the ground

players will be encouraged to go to the ground when tackled to form a ruck

a tightly packed crowd of people

Harry squeezed through the ruck to order another pint

take part in a ruck

too often the pack failed to ruck as a unit

in the games so far the pack has mixed its rucking and mauling well

compress or move (cloth or clothing) so that it forms a number of untidy folds or creases

her skirt was rucked up

a crease or wrinkle

a rucksack

I barely had time to repack my ruck

a quarrel or fight, especially a brawl involving several people

there was a rare old ruck before the police arrived

engage in a ruck

with no money and nothing to do, they started rucking