(Internet) The act of taking over an e-mail list or discussion thread with a subject unrelated to the original posting.

plural of threadjacking

plural of threadjacker

(Internet) One who takes over a discussion thread with a subject unrelated to the original posting.

Third-person singular simple present indicative form of threadjack

(Internet) To take over a discussion thread with a subject unrelated to the original posting.

simple past tense and past participle of threadjack