A clumsy person.
Awkward, lacking coordination, not graceful, not dextrous.
Not elegant or well-planned, lacking tact or subtlety.
Awkward or inefficient in use or construction, difficult to handle or manage especially because of shape.
A person whose abilities are less than normal.
That part of the axis of a curved line which is intercepted between the ordinate and the normal.
denormal
Less than normal.