Learner's definition of CLUMSY
[also more clumsy; most clumsy]
1 : moving or doing things in a very awkward way and tending to drop or break things
I'm sorry about spilling your wine—that was very clumsy of me.
I have very clumsy hands and tend to drop things.
He is very clumsy. = He is a very clumsy person.
2 : badly or awkwardly made or done 3 : hard to use : awkward to handle