holding a sword above one's head (kendo posture)
Martial arts term for a high guard position where the sword is raised overhead. Often used in kendo and other sword arts.
In the kendo match, he struck the opponent's head from a high guard posture.
haughty attitude; overbearing manner
Figurative use likening an arrogant, condescending attitude to the high sword posture. Often used in phrases like 大上段に構える (to take a high-and-mighty stance).
He always speaks with a haughty attitude, so people around him find him off-putting.