Top"sy-tur"vy (?), adv. [Earlier topside-turvey, topsy-tervy; probably for top so turvy; that is, the top as turvy, as it were turvy; where turvy probably means, overturned, fr. AS. torfian to throw.]
In an inverted posture; with the top or head downward; upside down; as, to turn a carriage topsy-turvy.
© Webster 1913.