a tromentator is a mix between a commentator and a troll. Ideally he/she has the mindset of a troll, without the vulgarity and outright crassness. They occaisonally make salient and profound observations and contribute to the discussion, but make just enough to not get banned.

A tromentator in general will disagree with the majority participants on a thread.

A portmanteau of carpe diem, a Latin phrase that means “Seize the Day!” and DM, which stands for Direct Messages. This word means seizing the day via DMs.