Lummox (noun)

A clumsy, stupid, or awkward person.

Origin:

The origin of the word lummox is uncertain, it is believed to be an alteration of the word "lummock" which means "a clumsy or awkward person".

Examples:

1. He was always breaking things, such a lummox.
2. The lummox tripped and fell on the stage in front of everyone.
3. She was such a lummox, she couldn't even pour a glass of water without spilling it.
4. The lummox dropped the vase and it shattered into a million pieces.
5. He was always getting in the way, what a lummox.