clunky
mod. ponderous and inefficient.The whole plan is too clunky. Try to prune it down.I got rid of all the clunky stuff. Now it's lean and mean.
ham-handed
mod. lacking dexterity; clumsy.If I wasn't so ham-handed, I could probably fix the thing myself.He is the most ham-handed guy I've ever seen.
stumbles
n. the inability to stand up and walk straight.I guess I have the stumbles today. Not enough sleep, I guess.Whoops! I have a case of the stumbles.