How Well Do You Know English Slang?
"Low Sunday," 1706, Quasimodo Sunday, from Latin quasi modo, first words of introit for the first Sunday after Easter: quasi modo geniti infantes "as newborn babes" (1 Pet. ii:2). The hunchback in Victor Hugo's novel was supposed to have been abandoned as an infant at Notre Dame on this day, hence his name. For first element, see quasi; for second see mode (n.1).