Definitions for "Ruck"
a basic attacking move intended to promote the ball down the field rather than specifically result in a touchdown.
When a runner has come into contact with opponents and the ball has gone to the ground, players may bind themselves into a ruck. There must be at least three players bound. The ruck ends when the ball leaves the ruck and can be handled by a player who is not part of the ruck, or when a scrum is ordered. A ruck is similar to a maul, except that the ball is on the ground. A player may use his/her hands to play the ball while it is in a ruck – doing so results in a penalty for the opposition.
a loose variation of a scrum
A heap; a rick.
The common sort, whether persons or things; as, the ruck in a horse race.
a crowd especially of ordinary or undistinguished persons or things; "his brilliance raised him above the ruck"; "the children resembled a fairy herd"
Short for "rucksack", it is the military word for "backpack".
backpack issued to infantry in Vietnam
To draw into wrinkles or unsightly folds; to crease; as, to ruck up a carpet.
A wrinkle or crease in a piece of cloth, or in needlework.
an irregular fold in an otherwise even surface (as in cloth)
Keywords:  roc
A roc.
Keywords:  cower, huddle, hen, squat, eggs
To cower; to huddle together; to squat; to sit, as a hen on eggs.
Ruck can refer to a contest for possession in different forms of football.