also: かちんとくる
expression, kuru verb (irregular)
to be annoyed; to be offended; to be irritated
Describes a sudden feeling of irritation or offense, often in response to someone's words or actions. The phrase is a set expression using the mimetic カチン (a sharp, clicking sound) and 来る.
彼の言い方にカチンと来た。
I got annoyed at the way he said it.
あの態度にはカチンと来るよ。
That attitude really gets on my nerves.