late 14c. (in Chaucer, Loller, c.1386), from M.Du. lollaerd, applied pejoratively to members of reforming sects c.1300 who devoted themselves to the care of the sick and poor, lit. "mumbler, mutterer," so called by critics who regarded them as heretics pretending to humble piety, from lollen "to mumble or doze." Generic late M.E. term for groups suspected of heresy, esp. followers of John Wycliffe.