Cack-handed

 
Cack-handed is a slang phrase used to mean either clumsy or left-handed. (Left-handedness being often asociated weith clumsiness though there is absolutely no relationship between the two.)
Left-handedness is the preference for the left hand over the right for everyday activities such as writing. Most left-handed people exhibit some degree of ambidexterity. Left-handedness is relatively uncommon; 90 to 93 percent of the adult population is right-handed.