1) Accidentpro 2) Accident-prone 3) Awkward 4) Inept 5) Oafish 1) Clumsy 2) Hardly agile 3) Hardly dexterous 4) Inept 5) Inept or thoughtless 6) Like an oaf 7) Like inspector clouseau 8) Unlike a pro athlete 9) Unwieldy 
Klutzy is American slang for foolish, clumsy.
clumsy; awkward: If you weren't so klutzy you wouldn't have dropped it. · unwieldy; bulky or awkward: a klutzy pair of boots. · inept or thoughtless; boneheaded: a klutzy remark.