Crooked, twisted, or unruly in appearance; contentious or bad-tempered; a Scottish/Northern English dialect term.
Scottish English from 'cam' (crooked) possibly influenced by 'cantankerous', used in Northern British dialects to describe both physical distortion and temperament.
Some languages mix physical descriptions with personality traits—calling someone 'twisted' or 'crooked' to mean they're grumpy or bad-tempered is actually pretty universal.
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