Definition of muckers:
(N) :
(German: Muckern, i.e. canting bigots, hypocrites) the nickname given to the followers of the teaching of Johann Heinrich Schönherr and Johann Wilhelm Ebel.
(N) :
Muckers, also known as ring toss (not to be confused with the ring toss carnival game) or circle horseshoes, is an outdoor game, commonly played at summer camps, in which players take turns throwing circular rings at a stick, standing about one foot high.