Know why cattywampus was trending last week?
1560s, from Middle French ritual or directly from Latin ritualis "relating to (religious) rites," from ritus "rite" (see rite). Related: Ritually.
1640s, from ritual (adj.).
ritual rit·u·al (rĭch'ōō-əl)n. A detailed act or series of acts carried out by an individual to relieve anxiety or to forestall the development of anxiety.