blundersome
/ˈblʌndərˌsəm/Definitions
1. adjective
Causing or characterized by blunders; awkward or clumsy.
“He was known for his blundersome behavior in high-pressure situations.”
2. noun
A person who is prone to making blunders; an awkward or clumsy person.
“The team’s blundersome player made a crucial error in the game.”