Verb
mark as (third-person singular simple present marks as, present participle marking as, simple past and past participle marked as)
To provide sufficient reason to come to a conclusion about something.
His loudly verbalized beliefs marked him as an ignorant bore.
He was obviously a very arrogant ragamuffin, and younger than she was, to boot. And he was wearing a necromancer's bells! Apart from that, he was quite handsome, which was another black mark as far as she was concerned. Garth Nix