Definition of upends:
(v) :
To tip or turn over.
(v) :
(transitive, figurative) To destroy, invalidate, overthrow, or defeat.
(v) :
(transitive, figurative) To affect or upset drastically.
(v) :
(transitive) To end up; to set on end.
(n) :
A hamlet in Kirtling parish, East Cambridgeshire district, Cambridgeshire, England (OS grid ref TL7058).