末まっ席せきを汚けがす

expression, godan verb (-su)

have the honor of being present; have the honor of being a member

Humble idiomatic expression used to modestly refer to one's own attendance at a meeting or membership in a group. Literally 'to soil the lowest seat with one's presence', it conveys humility and respect for the occasion or organization.

• 本ほん日じつの会かい議ぎに末まっ席せきを汚けがさせていただきます。

  I am honored to be present at today's meeting.