present participle of ruck

A crease, a wrinkle, a pucker, as on fabric.

(transitive) To crease or fold. / (intransitive) To become folded.

A throng or crowd of people or things; a mass, a pack.

Obsolete form of roc.

A small heifer.

(slang, especially military) A rucksack; a large backpack.

To carry a backpack while hiking or marching.

(UK, dialect, obsolete) To cower or huddle together; to squat; to sit, as a hen on eggs.

(obsolete, transitive) To act as a ruck in a stoppage in Australian rules football. / (transitive, rugby union) To contest the possession of the ball in a ruck.