clumsy

As adjectives the difference between clumsy and schlubby

is that clumsy is awkward, lacking coordination, not graceful, not dextrous while schlubby is (chiefly|us|informal) socially awkward, unattractive, clumsy, oafish, unkempt, fat, overweight.

As a noun clumsy

is a person.

As adjectives the difference between clumsy and ambisinister

is that clumsy is awkward, lacking coordination, not graceful, not dextrous while ambisinister is (rare) awkward or clumsy with both or either hand.

As a noun clumsy

is a person.

As adjectives the difference between clumsy and ambilevous

is that clumsy is awkward, lacking coordination, not graceful, not dextrous while ambilevous is having equally bad ability in both hands; clumsy; butterfingered.

As a noun clumsy

is a clumsy person.