
Cantankerous
Negative Connotation
Cantankerous implies strong disapproval and shouldn't be used flippantly.
The cantankerous landlord scared all the tenants.
Non-Physical Context
Use it to describe behavior or personality, not physical objects.
During the negotiations, his cantankerous demeanor was off-putting.
Typically Informal
Though not slang, 'cantankerous' suits casual or literary speech more than formal writing.
The book's cantankerous hero became a fan favorite.