I. ˈrək noun
Etymology: Middle English, heap, pile, of Scandinavian origin; akin to Old Norse hraukr rick — more at rick
Date: 15th century
1.
a. : the usual run of persons or things : generality
trying to rise above the ruck — Richard Holt
b. : an indistinguishable gathering : jumble
2. : the persons or things following the vanguard
finished the race in the ruck
II. verb
Etymology: ruck, noun, wrinkle
Date: 1812
: pucker , wrinkle